Lens driving device, camera module, and optical device

ABSTRACT

The present embodiments relates to a lens driving device comprising: a housing; a bobbin disposed in the housing; a coil disposed on the bobbin; a first magnet which is disposed on the housing and faces the coil; a second magnet disposed on the bobbin; and a sensor which is disposed on the housing and faces the second sensor, wherein the sensor comprises an upper surface, a lower surface disposed opposite the upper surface, an inner surface facing the second magnet, an outer surface disposed opposite the inner surface, and both lateral surfaces connecting the inner surface with the outer surface, the upper surface and the lower surface of the sensor are fixed to the housing, and one of the side surfaces of the sensor is opened.

CROSS REFERENCE TO RELATED APPLICATIONS

This application is a Continuation of U.S. application Ser. No.16/099,798, filed on Nov. 8, 2018, which is the National Phase of PCTInternational Application No. PCT/KR2017/004771, filed on May 8, 2017,which claims priority under 35 U.S.C. 119(a) to Patent Application Nos.10-2016-0056218, filed in the Republic of Korea on May 9, 2016,10-2016-0082896, filed in the Republic of Korea on Jun. 30, 2016,10-2016-0082901, filed in the Republic of Korea on Jun. 30, 2016,10-2016-0089090, filed in the Republic of Korea on Jul. 14, 2016,10-2016-0089093, filed in the Republic of Korea on Jul. 14, 2016, all ofwhich are hereby expressly incorporated by reference into the presentapplication.

TECHNICAL FIELD

This embodiment relates to a lens driving device, a camera module, andan optical device.

Background Art

This section provides background information related to the presentinvention, which is not necessarily prior art.

Concomitant with generalization of wide use of various mobile terminals,and commercialization of wireless internet services, demands byconsumers related to mobile terminals are also diversified to allowvarious types of peripheral devices to be mounted on the mobileterminals.

Among the representative items thereof, a camera module photographing asubject in a picture or a video may be mentioned. Meantime, a cameramodule equipped with auto focus function is recently used. Furthermore,a camera module equipped with auto focus feedback function has beendeveloped. Meantime, in order to implement the abovementioned auto focusfeedback function, there is a need to accurately detect a movement ofbobbin mounted with a lens to an optical axis direction.

However, the conventional camera module suffers from disadvantages inthat an optical axis direction position of a sensor is changed inresponse to a coated mount of adhesive in the manufacturing process.Furthermore, the conventional camera module suffers from disadvantagesin that an optical axis direction position of a sensing magnet ischanged in response to a coated mount of adhesive in the manufacturingprocess.

Meantime, in order to realize the abovementioned auto focus function andauto focus feedback function, there is a need to supply an electricpower to a driving part moving a lens and to electrically connect a lensmovement-sensing sensor to an outside element.

However, the convention lens driving device suffers from disadvantagesin that peaks and workability deteriorate in the coupling betweenconductive members for forming a conductive line for a driving part anda sensor.

Furthermore, the convention lens driving device suffers fromdisadvantages in that operation defects occur due to disengaged couplingafter reliability test because coupling between conductive members forforming a conductive line for a driving part and a sensor is notproperly implemented.

A camera module for miniaturization and low power consumption isdifficult in being applied with a VCM (Voice Coil Motor) used in theconventional camera module and therefore, studies thereto are beingbriskly waged. Demands and manufacturing increase for smart phones andelectronic products such as portable phones mounted with a camera.Trends are that a camera for portable phones is being high-pixelated andminiaturized and an actuator is also miniaturized, large-calibered andmulti-functionalized in response to the abovementioned trend.

Concomitant with miniaturization and slimming of cameras for mobilephones, an electromagnetic force of a lens driving device for cameramodule decreases and spring force of an elastic member also decreases.Moreover, the vibration motor for mobile phones is also changed in shapeto a linear vibration motor due to increased capacity of battery formobile phones in order to allow a vibration motor for vibration mode ofa mobile phone disposed at a lower side of a battery to be disposed nearto a camera module and to make vibration feel good.

The linear vibration motor suffers from disadvantages in that resolutionof a camera mounted on the mobile phone may deteriorate due to influencefrom vibration as the vibration is generated to an optical axisdirection of a lens driving device, and noise may be generated.

Furthermore, an outside shock, e.g., a shock generated during touchinput of a smart phone may result in generation of trembling on the lensdriving device mounted on the mobile phones, and the resolution of acamera may deteriorate due to the trembling.

DETAILED DESCRIPTION OF THE INVENTION Technical Subject

In order to solve the aforementioned disadvantages/problems, anexemplary embodiment of the present invention is to provide a lensdriving device in which an upper surface and a lower surface of a sensorare all fitted to a housing.

An exemplary embodiment of the present invention is to provide a lensdriving device in which an upper surface and a lower surface of asensing magnet are all fitted to a housing.

An exemplary embodiment of the present invention is to provide a lensdriving device in which peaks and workability are improved when aconductive line is formed for a driving part and a sensor.

An exemplary embodiment of the present invention is to provide a lensdriving device in which workability is simplified and an area of padpart is enlargeable by arranging and moving a conductive pad of asubstrate for supplying an electric power to an auto focus driving coilto a center part.

Furthermore, an exemplary embodiment of the present invention is toprovide a lens driving device in which soldering is excellent andreliability can be secured by designing position of pad at the samelevel as that of support member (1:1) or designing the position of padto be a bit lower than the support member.

Furthermore, an exemplary embodiment of the present invention is toprovide a camera module including a lens driving device and an opticaldevice.

An exemplary embodiment of the present invention is to provide a lensdriving device configured to restrict vibration of vibration motor at amobile phone or to restrict vibration of mover caused by outside shock,and to prevent deterioration of resolution caused by vibration of mover,a camera module including the lens driving device and an optical device.

Technical Solution

A lens driving device according to an exemplary embodiment of thepresent invention comprising: a housing; a bobbin disposed in thehousing; a coil disposed on the bobbin; a first magnet which is disposedon the housing and faces the coil; a second magnet disposed on thebobbin; and a sensor which is disposed on the housing and faces thesecond sensor, wherein the sensor comprises an upper surface, a lowersurface disposed opposite the upper surface, an inner surface facing thesecond magnet, an outer surface disposed opposite the inner surface, andboth lateral surfaces connecting the inner surface with the outersurface, the upper surface and the lower surface of the sensor are fixedto the housing, and one of the side surfaces of the sensor is opened.

Preferably, but not necessarily, the other surface of both lateralsurfaces in the sensor may be fixed to the housing.

Preferably, but not necessarily, the housing may include a lower guidepart contacting a lower surface of sensor, an upper guide partcontacting an upper surface of sensor, and a lateral guide partcontacting the other surface of sensor, and an inner guide contacting aportion of the inner surface of sensor.

Preferably, but not necessarily, at least one surface of the lowersurface, upper surface and the other surface and inner surface of sensormay be fixed to the housing using an adhesive.

Preferably, but not necessarily, the lens driving device may furthercomprise a substrate coupled to the sensor and disposed on the housing,wherein the sensor is disposed at an inner surface of substrate, anouter surface of substrate is disposed at a coupled surface of housing,wherein the coupled surface of housing includes a first surface parallelwith the outer surface of sensor, a second surface disposed on the firstsurface to form an obtuse angle with the first surface, and a thirdsurface disposed underneath the first surface to form an obtuse anglewith the first surface, wherein an upper surface of substrate disposedon the second surface and a lower surface of the substrate disposed onthe third surface are bent toward the sensor.

Preferably, but not necessarily, the housing may include a lateral guidepart contacting the other surface of both lateral surfaces of sensor,and a bonding infuse hole formed between the lateral guide part and thecoupled surface.

Preferably, but not necessarily, the lens driving device may furthercomprise a substrate coupled by the sensor and disposed at the housing,wherein the substrate includes a body part, a sensor mounting partextended from a first lateral surface of body part and coupled by thesensor, and a terminal part downwardly extended from the body part,wherein the a second lateral surface disposed opposite to the firstlateral surface of body part is coupled by being press-fitted to thehousing by an interference fitting method.

Preferably, but not necessarily, the lens driving device may furthercomprise a support member coupled to the housing and the bobbin andhaving elasticity on at least a portion thereof, wherein the supportmember may include an outer part coupled to the housing, an inner partcoupled to the bobbin, a connection part connecting the outer part andthe inner part, and a terminal part extended from the outer part,wherein the terminal part of substrate may be interposed between thesupport member and the terminal part.

Preferably, but not necessarily, the sensor may be disposed at a cornerpart formed between lateral parts of housing.

Preferably, but not necessarily, the housing may include a first lateralpart, a first corner part disposed at one side of the first lateralpart, and a second corner part disposed at the other side of the firstlateral part, wherein the sensor may be disposed at the first cornerpart, and the first magnet may include a first magnet unit disposed atthe first lateral part of housing, and the first magnet unit may be moreeccentrically disposed toward a second corner part side than the firstcorner part.

Preferably, but not necessarily, a portion of upper surface of sensorand a portion of lower surface of sensor may be fixed to the housing,and remaining portion of upper surface of sensor and remaining portionof lower surface of sensor may be opened.

Preferably, but not necessarily, the second magnet may be interposedbetween the coil and the sensor, and an upper surface and a lowersurface of second magnet may be fixed to the bobbin.

Preferably, but not necessarily, the bobbin may include an upper supportpart fixed by an upper surface of the second magnet, and a hole formedat the upper support part to open a portion of upper surface of secondmagnet.

A camera module according to an exemplary embodiment of the presentinvention may comprise: a PCB; an image sensor disposed at the PCB; alens driving device of claim 1 disposed at the PCB; and a lens coupledto a bobbin of the lens driving device and disposed on the image sensor.

An optical device according to an exemplary embodiment of the presentinvention may comprise: a body; a camera module of claim 14 disposed atthe body; and a display part disposed at one surface of body to outputan image photographed by the camera module.

A lens driving device according to an exemplary embodiment of thepresent invention may comprise: a housing including a hole; a bobbinaccommodated into the hole; a driving magnet disposed at the housing; acoil disposed at the bobbin to face the driving magnet; a sensing magnetdisposed at the bobbin; and a sensor disposed at the housing to detectthe sensing magnet, wherein an upper surface and a lower surface ofsensor may be fixed to the housing, and one lateral surface of bothlateral surfaces of sensor may be opened.

Preferably, but not necessarily, the other lateral surface of bothlateral surfaces of sensor may be fixed by being touched to the housing.

Preferably, but not necessarily, the housing may include a lower guidepart contacting a lower surface of sensor, an upper guide partcontacting an upper surface of sensor, a lateral guide part contactingthe other lateral surface of sensor and an inner guide part contacting aportion of inner surface of sensor.

Preferably, but not necessarily, at least one surface of the lowersurface, the upper surface, the other lateral surface and the innersurface of sensor may be fixed to the housing by an adhesive.

Preferably, but not necessarily, the lens driving device according to anexemplary embodiment of the present invention may further comprise asubstrate coupled by the sensor and disposed with the housing, whereinthe sensor may be disposed at an inner surface of substrate, an outsidesurface of substrate may contact a coupled surface of housing, and thecoupled surface may include a slant surface slantly formed to allow anupper surface and lower surface of substrate coupled to the coupledsurface to be inwardly bent.

Preferably, but not necessarily, the housing may include a bondinginfuse hole formed between a lateral guide part contacting the othersurface of both lateral surfaces of sensor and the coupled surface.

Preferably, but not necessarily, the lens driving device according to anexemplary embodiment of the present invention may further comprise asubstrate disposed at the housing, wherein the substrate may include abody part, a sensor mounting part extended from the body part to alateral surface of one side and coupled by the sensor, and a terminalpart downwardly extended from the body part, wherein the other lateralsurface of body part may be coupled to the housing by being press-fittedthereto.

Preferably, but not necessarily, the lens driving device may include asupport member coupled to the housing and the bobbin and havingelasticity on at least a portion thereof, wherein the support member mayinclude an outer part coupled to the housing, an inner part coupled tothe bobbin, a connection part connecting the outer part and the innerpart, and a terminal part extended from the outer part, wherein theterminal part of substrate may be interposed between the support memberand the terminal part.

Preferably, but not necessarily, the sensor may be disposed at a cornerpart of housing.

Preferably, but not necessarily, the housing may include a first lateralpart, a first corner part disposed at one side of the first lateralpart, and a second corner part disposed at the other side of the firstlateral part, wherein the sensor may be disposed at the first cornerpart, and the driving magnet disposed at the first lateral surface maybe disposed nearer to the second corner part than the first corner part.

Preferably, but not necessarily, a portion of upper surface of sensorand a portion of lower surface of sensor may be fixed to the housing,and remaining portion of upper surface of sensor and remaining portionof lower surface of sensor may be opened.

A camera module according to an exemplary embodiment of the presentinvention may comprise: a PCB disposed with an image sensor; a basedisposed at an upper surface of the PCB; a housing disposed at an upperside of base to include a hole; a bobbin accommodated into the hole; adriving magnet disposed at the housing; a coil disposed at the bobbin toface the driving magnet; a sensing magnet disposed at the bobbin; and asensor disposed at the housing to detect the sensing magnet, wherein anupper surface and a lower surface of sensor may be fixed to the housingand one lateral surface of both lateral surfaces of sensor may beopened.

An optical device according to an exemplary embodiment of the presentinvention may comprise: a main body; a camera module disposed at themain body to photograph an image of a subject; and a display partdisposed at one surface of main body to output an image photographed bythe camera module, wherein the camera module may include a PCB mountedwith an image sensor, a base disposed at an upper surface of PCB, ahousing disposed at an upper side of base to include a hole, a bobbinaccommodated into the hole, a driving magnet disposed at the housing, acoil disposed at the bobbin to face the driving magnet, a sensing magnetdisposed at the bobbin, and a sensor disposed at the housing to detectthe sensing magnet, wherein an upper surface and a lower surface ofsensor may be fixed to the housing and one lateral surface at one sidein both sides of sensor may be opened.

A lens driving device according to an exemplary embodiment of thepresent invention may comprise: a housing including a through hole; abobbin accommodated into the through hole; a driving magnet disposed atthe housing; a coil disposed at the bobbin to face the driving magnet; asensing magnet disposed at the bobbin; and a sensor disposed at thehousing to detect the sensing magnet, wherein the sensing magnet may bedisposed between the coil and the sensor and an upper surface and alower surface of sensing magnet may be fixed to the bobbin.

Preferably, but not necessarily, at least one portion of the uppersurface of sensing magnet and at least one portion of lower surface ofsensing magnet may be fixed to the bobbin by an adhesive.

Preferably, but not necessarily, the bobbin may include an upper supportpart disposed at an upper side of an upper surface of the sensingmagnet, and an upper open hole disposed at the upper support part toexpose a portion of the upper surface of sensing magnet to an upperside.

Preferably, but not necessarily, an upper surface of sensing magnet maybe fixed to the bobbin by an adhesive infused into the upper open hole.

Preferably, but not necessarily, the bobbin may include a lower supportpart disposed at a lower side of lower surface of sensing magnet, and alower open hole disposed at the lower support part to expose a portionof lower surface of sensing magnet to a lower side.

Preferably, but not necessarily, the bobbin may include a lateralsupport part supporting both lateral surfaces of sensing magnet, whereinthe lateral support part may include a support surface facing bothlateral surfaces of sensing magnet, a protrusion part gradually moreprotruding outwardly toward the sensing magnet, and a round partdisposed at rounded area where the support surface and an outside of theprotrusion part meet.

Preferably, but not necessarily, the bobbin may include a sensing magnetreception groove formed by being inwardly recessed from an outside ofbobbin and having a shape corresponding to that of the sensing magnet,and a coil reception groove formed by being inwardly recessed from anoutside of bobbin and having a shape corresponding to that of the coil,wherein the coil reception groove may be formed by being more inwardlyrecessed than the sensing magnet reception groove.

Preferably, but not necessarily, the sensing magnet may be disposed at acorner part of bobbin.

Preferably, but not necessarily, the lens driving device may furthercomprise a compensation magnet symmetrically formed with the sensingmagnet about an optical axis.

Preferably, but not necessarily, the coil may include a first cornerpart adjacently disposed with the sensing magnet, a third corner partadjacently disposed with the compensation magnet, and second and fourthcorner parts interposed between the first corner part and the thirdcorner part, wherein a distance between the first and third corner partsmay be shorter than that between the second and fourth corner parts.

Preferably, but not necessarily, an upper end of the sensing magnet maybe disposed at a position higher than an upper end of coil, and a lowerend of sensing magnet may be disposed at a position lower than a lowerend of the coil.

Preferably, but not necessarily, the sensor, the sensing magnet and thecoil may be disposed on an imaginary straight line.

A camera module according to an exemplary embodiment of the presentinvention may comprise: a PCB disposed with an image sensor; a basedisposed at an upper surface of the PCB; a housing disposed at an upperside of base to include a through hole; a bobbin accommodated into thethrough hole; a driving magnet disposed at the housing; a coil disposedat the bobbin to face the driving magnet; a sensing magnet disposed atthe bobbin; and a sensor disposed at the housing to detect the sensingmagnet, wherein the sensing magnet may be interposed between the coiland the sensor and an upper surface and a lower surface of sensingmagnet may be fixed to the bobbin.

An optical device according to an exemplary embodiment of the presentinvention may comprise: a main body; a camera module disposed at themain body to photograph an image of a subject; and a display partdisposed at one surface of main body to output an image photographed bythe camera module, wherein the camera module may include a PCB mountedwith an image sensor, a base disposed at an upper surface of PCB, ahousing disposed at an upper side of base to include a through hole, abobbin accommodated into the through hole, a driving magnet disposed atthe housing, a coil disposed at the bobbin to face the driving magnet, asensing magnet disposed at the bobbin, and a sensor disposed at thehousing to detect the sensing magnet, wherein the sensing magnet may beinterposed between the coil and the sensor and an upper surface and alower surface of sensing magnet may be fixed to the bobbin.

A lens driving device according to an exemplary embodiment of thepresent invention may comprise: a housing; a bobbin disposed at aninside of the housing; a coil disposed at the bobbin; a first magnetdisposed at the housing to face the coil; a support member coupled withthe housing and the bobbin; a substrate coupled with the housing; and asensor coupled with the substrate, wherein the support member mayinclude first and second support units, each spaced apart from theother, and each of the first and second support units may include anoutside part coupled with the housing, an inner part coupled with thebobbin, a connection part connecting the outer part and the inner part,and a terminal part downwardly extended from the outer part, and aninner part of first support unit and an inner part of second supportunit may be electrically connected to a coil, an outer part of firstsupport unit and an outer part of second support unit may be symmetricalbased on an optical axis, and a portion of substrate may be interposedbetween a terminal part of first support unit and a terminal part ofsecond support unit.

Preferably, but not necessarily, the terminal part of first support unitand the terminal part of second support unit may be symmetrical based onan imaginary surface including the optical axis.

Preferably, but not necessarily, the inner part of first support unitand the inner part of second support unit may be symmetrical based on animaginary surface including the optical axis, and the connection part offirst support unit and the connection unit of second support unit may beasymmetrical based on an imaginary surface including the optical axis.

Preferably, but not necessarily, the lens driving device may furthercomprise a second magnet disposed at the bobbin, wherein the sensor maybe disposed at a corner part of housing when viewed from an upper sideto thereby support movement of second magnet.

Preferably, but not necessarily, the lens driving device may furthercomprise a third magnet disposed at the bobbin, wherein the third magnetmay be disposed at a position symmetrical with the second magnet basedon an optical axis.

Preferably, but not necessarily, the housing may further include a firstlateral surface, a second lateral surface adjacent to the first lateralsurface, a third lateral surface adjacent to the second lateral surface,and a fourth lateral surface adjacent to the third and first lateralsurfaces, wherein the first magnet may include a first magnet partdisposed at the first lateral surface, a second magnet part disposed atthe second lateral surface, a third magnet part disposed at the thirdlateral surface, and a fourth magnet part disposed at the fourth lateralsurface.

Preferably, but not necessarily, the housing may include a first cornerpart interposed between the first lateral surface and the second lateralsurface and a second corner part interposed between the second lateralsurface and the third lateral surface, wherein the first magnet may bedisposed to be more adjacent to the second corner part than the firstcorner part.

Preferably, but not necessarily, the lens driving device may furthercomprise a base disposed at a lower side of housing, wherein the basemay include a first reception part inwardly recessed from an externallateral surface, and a second reception part more inwardly recessed fromthe external lateral surface than the first reception part, and at leastone portion of terminal part may be disposed at the first receptionpart, and at least one portion of substrate may be disposed at thesecond reception part.

Preferably, but not necessarily, the first reception part may bedisposed at both sides of second reception part.

Preferably, but not necessarily, the lens driving part may furthercomprise a base disposed at a lower side of housing, where at least oneportion of substrate and at least one portion of terminal part may beextended along a lateral surface of one side of base, and wherein thesubstrate may include first to fourth terminals, each mutually spacedapart, and wherein the first to fourth terminals may be interposedbetween a terminal part of first support unit and a terminal part ofsecond support unit.

A camera module according to an exemplary embodiment of the presentinvention may comprise: a PCB mounted with an image sensor; a lensmodule disposed at an upper side of image sensor; a housing disposed atan upper side of PCB; a bobbin disposed at an inside of housing toaccommodate the lens module; a coil disposed at the bobbin; a firstmagnet disposed at the housing to face the coil; a support membercoupled with the housing and the bobbin; a substrate coupled with thehousing; and a sensor coupled with the substrate, wherein the supportmember may include first and second support units each mutually spacedapart, and each of the first and second support units may include anexternal part coupled with the housing, an internal part coupled withthe bobbin, a connection part connecting the external part and theinternal part, and a terminal part downwardly extended from the externalpart, and an inner lateral part of first support unit and an innerlateral part of second support unit may be respectively and electricallyconnected to the coil, and an outer lateral part of first support unitand an outer lateral part of first support unit may be symmetrical basedon an optical axis, and a portion of the substrate may be interposedbetween a terminal part of the first support unit and a terminal part ofsecond support unit.

An optical device according to an exemplary embodiment of the presentinvention may comprise; a camera module; and a display part to output animage photographed by the camera module, wherein the camera module mayinclude: a PCB mounted with an image sensor; a lens module disposed atan upper side of image sensor; a housing disposed at an upper side ofPCB; a bobbin disposed at an inside of housing to accommodate the lensmodule; a coil disposed at the bobbin; a first magnet disposed at thehousing to face the coil; a support member coupled with the housing andthe bobbin; a substrate coupled with the housing; and a sensor coupledwith the substrate, wherein the support member may include first andsecond support units each mutually spaced apart, and each of the firstand second support units may include an external part coupled with thehousing, an internal part coupled with the bobbin, a connection partconnecting the external part and the internal part, and a terminal partdownwardly extended from the external part, and an inner lateral part offirst support unit and an inner lateral part of second support unit maybe respectively and electrically connected to the coil, and an outerlateral part of first support unit and an outer lateral part of firstsupport unit may be symmetrical based on an optical axis, and a portionof the substrate may be interposed between a terminal part of the firstsupport unit and a terminal part of second support unit.

A lens driving device according to an exemplary embodiment of thepresent invention may comprise: a housing; a bobbin disposed at aninside of the housing; a coil disposed at the bobbin; a first magnetdisposed at the housing to face the coil; a support member coupled withthe housing and the bobbin; a substrate coupled with the housing; and asensor coupled with the substrate, wherein the support member mayinclude first and second support units, each mutually spaced apart fromthe other, the substrate may include a terminal electrically connectedto the support member, and each of the first and second support unitsmay include an external lateral part coupled with the housing, aninternal lateral part coupled with the bobbin, a connection partconnecting the external lateral part and the internal lateral part, andone portion of external lateral part may include a coupling partextended to a position corresponding to that of the substrate, and theterminal of substrate and the coupling part of external lateral part maybe electrically connected, and an area of terminal at the substrate maybe such that an area of a lower surface at the coupling part may begreater than an area of an upper surface at the coupling part based onthe coupling part.

Preferably, but not necessarily, the coupling part may include anextension part extended from the external lateral part, and a pad parthaving a width wider than that of the extension part at a positioncorresponding to that of the terminal of substrate.

Preferably, but not necessarily, the coupling part may be extended morethan a distal end of the internal lateral part.

Preferably, but not necessarily, the external lateral part of firstsupport unit and the coupling part may be symmetrical with the externallateral part of second support unit and the coupling part based on animaginary surface including an optical axis.

Preferably, but not necessarily, the external lateral part of firstsupport unit and the coupling part may be asymmetrical with the externallateral part of second support unit and the coupling part based on anoptical axis.

Preferably, but not necessarily, the terminal of substrate may include afirst pad coupled with the coupling part of first support unit, a secondpad spaced apart from the first pad and coupled with the coupling partof second support unit, and the first pad and the second pad may bedisposed within a first area integrally formed on the substrate.

Preferably, but not necessarily, the lens driving device may furthercomprise a second magnet disposed at the bobbin, and the sensor maydetect movement of second magnet, and the sensor may be electricallyconnected with the substrate, and a conductive line electricallyconnected to the sensor may not pass through the first area at thesubstrate.

Preferably, but not necessarily, the substrate may be disposed at aninside of the support member, and the terminal may be disposed at aninternal lateral surface of substrate to be electrically connected tothe support member.

Preferably, but not necessarily, the substrate may be disposed at anoutside of support member, and the terminal may be disposed at anexternal lateral surface of substrate to be electrically connected tothe support member, and the substrate may further include a through holeadjacently formed with the terminal.

Preferably, but not necessarily, the terminal of substrate may bedisposed only at a lower surface of coupling part.

A lens driving device according to another exemplary embodiment ofpresent invention may comprise: a housing; a bobbin disposed at aninside of the housing; a coil disposed at the bobbin; a first magnetdisposed at the housing to face the coil; a support member coupled withthe housing and the bobbin; a substrate coupled with the housing; and asensor coupled with the substrate, wherein the support member mayinclude first and second support units, each mutually spaced apart fromthe other, the substrate may include a terminal electrically connectedto the support member, and each of the first and second support unitsmay include an external lateral part coupled with the housing, aninternal lateral part coupled with the bobbin, a connection partconnecting the external lateral part and the internal lateral part, andone portion of external lateral part may include a coupling partextended to a position corresponding to that of the substrate, and theterminal of substrate and the coupling part of external lateral part maybe electrically connected, and an area of terminal at the substrate maybe such that an area of a lower surface at the coupling part may begreater than an area of an upper surface at the coupling part based onthe coupling part.

A lens driving device according to still another exemplary embodiment ofpresent invention may comprise: a housing; a bobbin disposed at aninside of the housing; a coil disposed at the bobbin; a first magnetdisposed at the housing to face the coil; a support member coupled withthe housing and the bobbin; a substrate coupled with the housing; and asensor coupled with the substrate, wherein the support member mayinclude first and second support units, each mutually spaced apart fromthe other, the substrate may include a terminal electrically connectedto the support member, and each of the first and second support unitsmay include an external lateral part coupled with the housing, aninternal lateral part coupled with the bobbin, a connection partconnecting the external lateral part and the internal lateral part, andone portion of external lateral part may include a coupling partextended to a position corresponding to that of the substrate, and theterminal of substrate and the coupling part of external lateral part maybe electrically connected, and an area of terminal at the substrate maybe same as an area of an upper surface of coupling part and same as anarea of a lower surface of coupling part.

A camera module according to an exemplary embodiment of the presentinvention may comprise: a PCB mounted with an image sensor; a housingdisposed at an upper side of PCB; a bobbin disposed at an inside of thehousing; a coil disposed at the bobbin; a first magnet disposed at thehousing to face the coil; a support member coupled with the housing andthe bobbin; a substrate coupled with the housing; and a sensor coupledwith the substrate, wherein the support member may include first andsecond support units each mutually spaced apart, and the substrate mayinclude a terminal electrically connected to the support member, each ofthe first and second support units may include an external part coupledwith the housing, an internal part coupled with the bobbin, a connectionpart connecting the external part and the internal part, and one portionof external part may include a coupling part extended to a positioncorresponding to that of the terminal of substrate, and the terminal ofsubstrate and the coupling part of external part may be electricallyconnected, and an area of terminal at the substrate may be such that anarea of a lower surface of coupling part may be greater than that of anupper surface of coupling part based on the coupling part.

An optical device according to an exemplary embodiment of the presentinvention may comprise; a camera module photographing a subject; and adisplay part to output an image photographed by the camera module,wherein the camera module may include: a PCB mounted with an imagesensor; a housing disposed at an upper side of PCB; a bobbin disposed atan inside of housing; a coil disposed at the bobbin; a first magnetdisposed at the housing to face the coil; a support member coupled withthe housing and the bobbin; a substrate coupled with the housing; and asensor coupled with the substrate, wherein the support member mayinclude first and second support units each mutually spaced apart, andthe substrate may include a terminal electrically connected to thesupport member, each of the first and second support units may includean external part coupled with the housing, an internal part coupled withthe bobbin, a connection part connecting the external part and theinternal part, and one portion of external part may include a couplingpart extended to a position corresponding to that of the terminal ofsubstrate, and the terminal of substrate and the coupling part ofexternal part may be electrically connected, and an area of terminal atthe substrate may be such that an area of a lower surface of couplingpart may be greater than that of an upper surface of coupling part basedon the coupling part.

A lens driving device according to an exemplary embodiment of presentinvention may comprise: a bobbin accommodating a lens; a coil disposedat the bobbin; a housing accommodated into an inside of bobbin; a magnetdisposed at the housing to move the bobbin in response to interactionwith the coil; and an elastic member including an inner frame coupledwith the bobbin, an external frame coupled with the housing, and aconnection part connecting the inner frame and the external frame; and adamper member interposed between the connection part and the bobbin,wherein a peak of a first resonance frequency at a first frequencyresponse characteristic relative to a peak of ratio between an inputsignal applied to the coil and displacement of bobbin may be lower asmuch as 10 [dB]˜20 [dB] than a reference peak, wherein the referencepeak may be a peak of first resonance frequency at a second frequencyresponse characteristic relative to a peak of ratio between an inputsignal applied to the coil when there is no damper member and adisplacement of bobbin.

Preferably, but not necessarily, a first peak at the first referencefrequency may be lower as much as 3 [dB]˜6 [dB] than a second peak atthe second reference frequency, the first reference frequency may be afrequency lower as much as a preset frequency difference of the firstresonance frequency at the first frequency response characteristic, andthe second reference frequency may be a frequency lower as much thepreset frequency difference of first resonance frequency at the secondfrequency response characteristic.

Preferably, but not necessarily, the preset frequency difference may be40 [dB]˜70 [dB]. Preferably, but not necessarily, the first resonancefrequency at the first frequency response characteristic may be 50[dB]˜170 [dB].

Preferably, but not necessarily, the first resonance frequency at thefirst frequency response characteristic may be higher by as much as 5[dB]˜10 [dB] than the first resonance frequency at the second frequencyresponse characteristic.

Preferably, but not necessarily, the bobbin may be formed with aprotrusion, and the connection part of elastic member may include aplurality of bent parts, and any one selected from the plurality of bentparts may be so disposed as to wrap a lateral surface of the protrusion,and a damper member may be interposed between the lateral surface ofprotrusion and the any one selected from the plurality of bent parts.

Preferably, but not necessarily, a first bent part may be disposed at acenter of the plurality of bent parts.

Preferably, but not necessarily, the connection part may include firstbent parts convex to a housing direction from the bobbin, and secondbent parts disposed between adjacent first bent parts, and the bentmember may be disposed among any one of the first bent parts, any of alateral surface of protrusion or any one of the second bent parts and alateral surface of the protrusion.

Preferably, but not necessarily, the elastic member may include an upperelastic member including a first inner frame coupled with the bobbin, afirst external frame coupled with the housing, and a first connectionpart connecting the first inner frame and the external frame, and alower elastic member including a second inner frame coupled with thebobbin, a second external frame coupled with the housing, and a secondconnection part connecting the second inner frame and the secondexternal frame, wherein the damper member may include a first dampermember interposed between the first connection part and an upper surfaceof bobbin, and a second damper member interposed between the secondconnection part and a lower surface of bobbin.

Preferably, but not necessarily, the bobbin may include a firstprotrusion provided at an upper surface, and a second protrusionprovided at a lower surface, and the first damper member may beinterposed between the first connection part and a lateral surface offirst protrusion, and the second damper member may be interposed betweenthe second connection part and the second protrusion.

Preferably, but not necessarily, each of the first and second connectionparts may include a plurality of bent parts, and the first damper membermay be interposed between a bent part disposed at a center among theplurality of bent parts of the first connection part and a lateralsurface of the first protrusion, and the second damper member may beinterposed between a bent part disposed at a center among the pluralityof bents of the second connection part and a lateral surface of secondprotrusion.

Preferably, but not necessarily, the magnet may include two drivingmagnets disposed at a lateral surface of housing to allow facing eachother.

A camera module according to an exemplary embodiment of the presentinvention may comprise: a lens barrel; a lens driving device moving thelens barrel according to an exemplary embodiment; and an image sensorconverting an image incident through the lens driving device to anelectric signal.

An optical device according to an exemplary embodiment may comprise: adisplay module including a plurality of pixels changing in color inresponse to an electric signal; a camera module according to anexemplary embodiment; a display module; and a controller controlling theoperation of the camera module.

Advantageous Effects

Through the exemplary embodiments, a sensor's optical axis directionposition can be constantly maintained, even if amount of adhesive coatedbetween a sensor and a housing is inconsistent for each product in themanufacturing process.

Furthermore, a sensor can be assembled at a fixed regular position atall times by a horizontal guide when the sensor is inserted in ahousing.

Still furthermore, a sensor's optical axis direction position can beconstantly maintained even if amount of adhesive coated between asensing magnet and a bobbin is inconsistent for each product in themanufacturing process.

Still furthermore, an output level can be increased that is detected bya sensor as a distance between a sensing magnet and a sensor is nearing.

Through the exemplary embodiments, an AF (Auto Focus) resistance can bedecreased over a driving coil conductive pad being disposed on asubstrate, and productivity can be increased through improvement inworkability and peak. Thus, reliability can be secured.

Furthermore, soldering between a terminal part of lower support memberand a PCB has an excellent advantage according to the present exemplaryembodiment.

Furthermore, a reduced number of conductive lines to be formed on asubstrate enable optimization of pattern design within a limited space.

Through the exemplary embodiments, soldering with a support member canhave an advantageous effect using an area and a position with a pad partformed on a substrate, whereby reliability can be secured.

Still furthermore, a pad part is disposed at a center side of substrateto enable optimization in pattern design of substrate, wherebyresistance generated from the substrate can be reduced.

The vibration on a mover caused by vibration of a vibration motor in amobile phone or by outside shock can be restricted to thereby preventthe resolution from being deteriorated that is caused by vibration onthe mover.

BRIEF DESCRIPTION OF DRAWINGS

FIGS. 1 to 18 are illustrations of first exemplary embodiment of thepresent invention, FIGS. 19 to 31 are illustrations of second exemplaryembodiment of the present invention, and FIGS. 32 to 49 areillustrations of third exemplary embodiment of the present invention.

FIG. 1 is a perspective view of a lens driving device according to anexemplary embodiment of the present invention.

FIG. 2 is an exploded perspective view illustrating a lens drivingdevice according to an exemplary embodiment of present invention.

FIG. 3 is a cross-sectional view taken along line A-A′ of FIG. 1.

FIG. 4 is a partially enlarged cross-sectional view illustrating aportion of FIG. 3.

FIG. 5 is a perspective view illustrating a housing of a lens drivingdevice according to an exemplary embodiment of the present invention.

FIG. 6 is a perspective view illustrating a coupled state between ahousing of a lens driving device and a substrate according to anexemplary embodiment of the present invention.

FIG. 7 is a bottom perspective view illustrating a coupled state betweena housing of a lens driving device and a substrate according to anexemplary embodiment of the present invention.

FIG. 8 is a perspective view illustrating a coupled state between ahousing of a lens driving device and a sensor, and a coupled statebetween a sensing magnet and a bobbin according to an exemplaryembodiment of the present invention while omitting some portions ofhousing and bobbin.

FIG. 9 is an exploded perspective view of a bobbin, a sensing magnet anda compensation magnet of a lens driving device according to an exemplaryembodiment of present invention.

FIG. 10 is a perspective view of a driving coil in a lens driving deviceaccording to an exemplary embodiment of present invention.

FIG. 11 is a perspective view illustrating a coupled state between asensing magnet of lens driving device and a bobbin according to anexemplary embodiment of the present invention.

FIG. 12 is a perspective view illustrating a coupled state among asensing magnet of lens driving device, a driving coil and a bobbinaccording to an exemplary embodiment of the present invention.

FIG. 13 is a plane view illustrating a coupled state between a sensingmagnet of lens driving device and a bobbin according to an exemplaryembodiment of the present invention.

FIG. 14 is a bottom view illustrating a coupled state between a sensingmagnet of lens driving device and a bobbin according to an exemplaryembodiment of the present invention.

FIG. 15 is an exploded perspective view of a support member in a lensdriving device according to an exemplary embodiment of presentinvention.

FIG. 16 is a lateral view illustrating a lens driving device accordingto an exemplary embodiment of present invention, while omitting someportions of the lens driving device.

FIG. 17 is a perspective view illustrating a lower support member of alens driving device according to an exemplary embodiment of presentinvention.

FIG. 18 is a perspective view illustrating a base of a lens drivingdevice according to an exemplary embodiment of present invention.

FIG. 19 is a perspective view illustrating a lens driving deviceaccording to a first exemplary embodiment of present invention.

FIG. 20 is an exploded perspective view illustrating a lens drivingdevice according to a first exemplary embodiment of present invention.

FIG. 21 is a perspective view illustrating a housing of a lens drivingdevice according to an exemplary embodiment of present invention.

FIG. 22 is a perspective view illustrating a coupled state between ahousing of a lens driving device and a substrate according to a firstexemplary embodiment of the present invention.

FIG. 23 is a bottom perspective view illustrating a coupled statebetween a housing of a lens driving device and a substrate according toa first exemplary embodiment of the present invention.

FIG. 24 is a cross-sectional view taken along line A-A of FIG. 1.

FIG. 25 is a plane view illustrating some elements of a lens drivingdevice according to a first exemplary embodiment of present invention.

FIG. 26 is a perspective view illustrating a lower support member of alens driving device according to a first exemplary embodiment of thepresent invention.

FIG. 27 is a bottom perspective view illustrating a coupled statebetween a lower support member of a lens driving device and a substrateaccording to a first exemplary embodiment of the present invention.

FIG. 28 is a bottom perspective view illustrating some elements of alens driving device according to a first exemplary embodiment of presentinvention.

FIG. 29 is a bottom perspective view illustrating some elements of alens driving device according to a second exemplary embodiment ofpresent invention.

FIG. 30 is a bottom perspective view illustrating some elements of alens driving device according to a third exemplary embodiment of presentinvention.

FIG. 31 is a bottom perspective view illustrating some elements of alens driving device according to a fourth exemplary embodiment ofpresent invention.

FIG. 32 is an exploded perspective view of a lens driving deviceaccording to an exemplary embodiment of present invention.

FIG. 33 is a coupled perspective view of a lens driving device exceptfor a cover member of FIG. 32.

FIG. 34 is a first coupled perspective view of between a bobbin and acoil illustrated in FIG. 32.

FIG. 35 is a second coupled perspective view of between a bobbin and acoil illustrated in FIG. 32.

FIG. 36 is a coupled perspective view of between a housing and a circuitsubstrate illustrated in FIG. 32.

FIG. 37 is a plane view of an upper elastic member illustrated in FIG.32.

FIG. 38 is a plane view of a lower elastic member illustrated in FIG.32.

FIG. 39 is a schematic view illustrating a first damper memberinterposed between a connection part of upper elastic member and abobbin.

FIG. 40a is a schematic cross-sectional view of a bent part, a firstdamper member and a first protrusion illustrated in FIG. 39 to an ABdirection according to an exemplary embodiment of present invention.

FIG. 40b is a schematic cross-sectional view of a bent part, a firstdamper member and a first protrusion part illustrated in FIG. 39 to anAB direction according to another exemplary embodiment of presentinvention.

FIG. 40c is a schematic cross-sectional view of a bent part, a firstdamper member and a first protrusion part illustrated in FIG. 39 to anAB direction according to still another exemplary embodiment of presentinvention.

FIG. 41 is a schematic view of bent parts and first damper memberaccording to another exemplary embodiment of present invention.

FIG. 42 is a schematic view of second damper member according to anexemplary embodiment of present invention.

FIG. 43a is a first perspective view of a bobbin according to anotherexemplary embodiment of present invention.

FIG. 43b is a second perspective view of a bobbin according to anotherexemplary embodiment of present invention.

FIG. 44 is a schematic view of first damper members according to anotherexemplary embodiment of present invention.

FIG. 45a is a schematic view of a first frequency responsecharacteristics on peak of ratio of displacement at bobbin and a drivingsignal applied to a coil when a damper member is disposed according toan exemplary embodiment of present invention.

FIG. 45b is a schematic view of a second frequency responsecharacteristics on peak of ratio of displacement at bobbin and a drivingsignal applied to a coil when a damper member is not disposed accordingto an exemplary embodiment of present invention.

FIG. 46a is a displacement of a mover according to a time in case ofFIG. 45 b.

FIG. 46b is a displacement of a mover according to a time in case ofFIG. 45 a.

FIG. 47 is an exploded perspective view of a camera module according toan exemplary embodiment of present invention.

FIG. 48 is a perspective view of a portable terminal according to anexemplary embodiment of present invention.

FIG. 49 is a block diagram of a portable terminal illustrated in FIG.48.

BEST MODE

Some exemplary embodiments of present invention will be described indetail with reference to the accompanying drawings. In describing areference numeral for each element, a same reference numeral will bedesignated, if possible, for the same element, albeit being differentlyindicated on other drawings. Furthermore, a detailed explanation of someelements will be omitted in explaining exemplary embodiments of thepresent invention if obstructed in the understanding of exemplaryembodiment of present invention.

In describing elements in the exemplary embodiments of the presentinvention, the terms, first, second, A, B (a), (b), etc., may be used.These terms may be used only to distinguish one element from anotherelement, and the nature, order or sequence is not restricted by theseterms.

When an element is referred to as being “accessed to”, “coupled to,” or“connected to,” another element, it should be appreciated that theelement may be directly accessed, connected or coupled to the otherelement, or intervening elements may be present therebetween.

The optical axis direction used hereinunder is defined as an opticalaxis direction of a lens module coupled to a lens driving device.Meantime, the “optical axis direction” may be interchangeably used witha vertical direction and a z axis direction.

The ‘auto focus function’ used hereinafter may be defined as a functionof adjusting a focus relative to a subject by adjusting a distance to animage sensor through movement of lens module to an optical axisdirection in response to a distance to the subject. Meantime, an ‘autofocus’ may be interchangeably used with an ‘AF (Auto Focus)’.

The “handshake correction function” hereinafter used may be defined as afunction to move or tilt a lens module to a direction perpendicular toan optical axis direction in order to offset vibration (movement)generated from an image sensor by an outside force. Meantime, the“handshake correction” may be interchangeably used with an “OIS (OpticalImage Stabilization)”.

Hereinafter, any one of a ‘driving magnet (320)’ and a ‘sensing magnet(710)’ and a ‘compensation magnet (730)’ may be called a ‘first magnet’,a remaining another may be called a ‘second driving part’, and aremaining still another may be called a ‘third magnet’.

FIGS. 1 to 18 are illustrations of first exemplary embodiment of thepresent invention.

Hereinafter, configuration of an optical device according to anexemplary embodiment will be described.

The optical device according to an exemplary embodiment of the presentinvention may be any one of a hand phone, a mobile phone, a smart phone,a portable smart device, a digital camera, a notebook computer (laptopcomputer), a digital broadcasting terminal, a PDA (Personal DigitalAssistant), a PMP (Portable Multimedia Player) and a navigation device.However, the present invention is not limited thereto, and may includeany device capable of photographing an image or a photograph.

The optical device according to an exemplary embodiment may include amain body (not shown), a camera module and a display part (not shown).However, any one or more of the elements in main body, the camera moduleand the display part may be omitted or changed from the optical device.

The main body may form an external shape of an optical device. The mainbody may include a cubic shape, for example. However, the presentinvention is not limited thereto. As a modification, the main body maybe partially rounded. The main body may accommodate a camera module. Onesurface of a main body may be disposed with a display part.

The camera module may be disposed on the main body. The camera modulemay be disposed at one surface of main body. At least one portion ofcamera module may be accommodated into the main body. The camera modulemay photograph an image of a subject.

The display part may be disposed on the main body. The display part maybe disposed at one surface of main body. That is, the display part maybe disposed on a same surface as that of camera module. Alternatively,the display part may be disposed at the other surface of main body. Thedisplay part may be disposed on a surface disposed at an oppositesurface of a surface disposed with the camera module. The display partmay output an image photographed by the image sensor.

Hereinafter, configuration of a camera module according to an exemplaryembodiment of the present invention will be described.

A camera module may include a lens driving device, a lens module (notshown), an IR (Infrared) filter (not shown), a PCB (Printed CircuitBoard, not shown), and an image sensor (not shown), and may furtherinclude a controller (not shown). However, any one or more of the lensdriving device, the lens module the IR filter, the PCB, the image sensorand the controller may be omitted or changed from the configuration ofcamera module.

The lens module may include one or more lenses (not shown). The lensmodule may include a lens and a lens barrel (not shown). However, oneelement of lens module is limited by the lens module, and any holderstructure capable of supporting one or more lenses will suffice. Thelens module may move along with a portion of the lens driving device bybeing coupled to the lens driving device. The lens module may be coupledto an inner side of a lens driving device. The lens module may bescrew-coupled to a lens driving device. The lens module may be coupledwith a lens driving device by an adhesive (not shown). Meantime, a lighthaving passed the lens module may be irradiated on an image sensor.

The infrared filter may be disposed at a groove (510) of a base (500).Alternatively, the infrared filter may be disposed at a holder member(not shown) separately formed on the base (500). The infrared filter mayserve to prevent a light of infrared ray region from entering the imagesensor. The infrared filter may be an infrared absorption filter (bluefilter). The infrared filter may include an infrared cut-off filter. Theinfrared filter may be interposed between a lens module and an imagesensor. The infrared filter may be formed with a film material or aglass material. The infrared filter may be formed by allowing aninfrared cut-off coating material to be coated on a plate-shaped opticalfilter such as an imaging plane protection cover glass or a cover glass.However, the present invention is not limited thereto.

The PCB may be disposed at a lower side of lens driving device. The PCBmay support the lens driving device. The PCB may be mounted with animage sensor. The PCB may be disposed at an inner upper side with animage sensor and may be disposed at an outer upper side with a sensorholder (not shown), for example. An upper side of sensor holder may bedisposed with a lens driving device. Alternatively, the PCB may bedisposed at an upper outer side with a lens driving device, and may bedisposed at an inner upper side with an image sensor. Through thestructure described as above, a light having passed the lens moduleaccommodated at an inner side of the lens driving device may beirradiated on the image sensor mounted on the PCB. The PCB may supply apower to the lens driving device. Meantime, the PCB may be disposed witha controller to control the lens driving device.

The image sensor may be mounted on the PCB. The image sensor may be sodisposed as to match the lens module by way of optical axis, throughwhich the image sensor can obtain a light having passed the lens module.The image sensor may output the irradiated light in an image. The imagesensor may be, for example, a CCD (charge coupled device), a MOS (metaloxide semi-conductor), a CPD and a CID. However, the types of imagesensors are not limited thereto.

The controller may be mounted on a PCB. The controller may individuallycontrol a direction, intensity and an amplitude of a current supplied toeach element forming the lens driving device. The controller may performan auto focus function of a camera module by controlling the lensdriving device. That is, the controller may move a lens module to anoptical axis direction by controlling the lens driving device.Furthermore, the controller may perform a feedback control of the autofocus function. To be more specific, the controller may provide a moreaccurate auto focus function by controlling a current or a powersupplied to a driving coil part (220) by receiving a position of lensmodule detected by a sensor (720).

Hereinafter, configuration of lens driving device according to anexemplary embodiment of present invention will be described withreference to the accompanying drawings.

FIG. 1 is a perspective view of a lens driving device according to anexemplary embodiment of the present invention, FIG. 2 is an explodedperspective view illustrating a lens driving device according to anexemplary embodiment of present invention, FIG. 3 is a cross-sectionalview taken along line A-A′ of FIG. 1, FIG. 4 is a partially enlargedcross-sectional view illustrating a portion of FIG. 3, FIG. 5 is aperspective view illustrating a housing of a lens driving deviceaccording to an exemplary embodiment of the present invention, FIG. 6 isa perspective view illustrating a coupled state between a housing of alens driving device and a substrate according to an exemplary embodimentof the present invention, FIG. 7 is a bottom perspective viewillustrating a coupled state between a housing of a lens driving deviceand a substrate according to an exemplary embodiment of the presentinvention, FIG. 8 is a perspective view illustrating a coupled statebetween a housing of a lens driving device and a sensor, and a coupledstate between a sensing magnet and a bobbin according to an exemplaryembodiment of the present invention while omitting some portions ofhousing and bobbin, FIG. 9 is an exploded perspective view of a bobbin,a sensing magnet and a compensation magnet of a lens driving deviceaccording to an exemplary embodiment of present invention, FIG. 10 is aperspective view of a driving coil in a lens driving device according toan exemplary embodiment of present invention, FIG. 11 is a perspectiveview illustrating a coupled state between a sensing magnet of lensdriving device and a bobbin according to an exemplary embodiment of thepresent invention, FIG. 12 is a perspective view illustrating a coupledstate among a sensing magnet of lens driving device, a driving coil anda bobbin according to an exemplary embodiment of the present invention,FIG. 13 is a plane view illustrating a coupled state between a sensingmagnet of lens driving device and a bobbin according to an exemplaryembodiment of the present invention, FIG. 14 is a bottom viewillustrating a coupled state between a sensing magnet of lens drivingdevice and a bobbin according to an exemplary embodiment of the presentinvention, FIG. 15 is an exploded perspective view of a support memberin a lens driving device according to an exemplary embodiment of presentinvention, FIG. 16 is a lateral view illustrating a lens driving deviceaccording to an exemplary embodiment of present invention, whileomitting some portions of the lens driving device, FIG. 17 is aperspective view illustrating a lower support member of a lens drivingdevice according to an exemplary embodiment of present invention, andFIG. 18 is a perspective view illustrating a base of a lens drivingdevice according to an exemplary embodiment of present invention.

The lens driving device may include a cover member (100), a mover (200),a stator (300), a substrate (400), a base (500), a support member (600)and a sensing unit (700). However, any one or more of the cover member(100), the mover (200), the stator (300), the substrate (400), the base(500), the support member (600) and the sensing unit (700) may beomitted or changed from the lens driving device according to theexemplary embodiment of the present invention.

The cover member (100) may form an exterior look of the lens drivingdevice. The cover member (100) may take a bottom-opened cubic shape.However, the present invention is not limited thereto.

The cover member (100) may be formed with a metal material. To be morespecific, the cover member (100) may be formed with a metal plate. Inthis case, the cover member (100) can shield an EMI (Electro MagneticInterference). Because of the characteristics of the cover member (100)thus described, the cover member (100) may be called an “EMI shieldcan”. The cover member (100) may shield the electromagnetic wavesgenerated from an outside of the lens driving device from entering intothe cover member (100). Furthermore, the cover member (100) may preventthe electromagnetic waves generated from inside of the cover member(100) from being emitted to an outside of the cover member (100).However, the material of the cover member (100) is not limited thereto.

The cover member (100) may include an upper plate (101) and a lateralplate (102). The cover member (100) may include an upper plate (101) anda lateral plate (102) extended downwardly from an outside of the upperplate (101). A lower end of the lateral plate (102) at the cover member(100) may be mounted on a terminal part (550) of base (500). The covermember (100) may be mounted at an inner lateral surface on the base(500) by being in close contact, in part or in whole, with a lateralsurface of base (500). A inner space formed by the cover member (100)and the base (500) may be disposed with a mover (200), a stator (300)and a support member (600). Through this type of structure, the covermember (100) may protect an inner element from the outside shock or, atthe same time, prevent the infiltration of outside pollution materials.However, a lower end at the lateral plate (102) of cover member (100)may be directly coupled with a PCB disposed at a lower side of base(500).

The cover member (100) may include an opening (110) and a rotationprevention part (120). However, any one or more of the opening (110) andthe rotation prevention part (120) may be omitted or changed from thecover member (100).

The opening (110) may be formed at an upper plate (101) of cover member(100). The opening (110) may expose the lens module toward an upperside. The opening (110) may be formed at the upper plate (101) to exposethe lens module. The opening (110) may be with a shape corresponding tothat of the lens module. The opening (110) may be formed larger in sizethan a diameter of the lens module to allow the lens module to beassembled with the bobbin (210) through the opening (110). Meantime, thelight introduced into through the opening (110) may pass through thelens module. At this time, the light having passed the lens module maybe obtained by the image sensor as an image.

The rotation prevention part (120) may be extended from an inner side ofthe upper plate (101) to a lower side. The rotation prevention part(120) can prevent the bobbin (210) from rotating. The rotationprevention part (120) may be extended from an inner circumferentialsurface of upper plate (101) at the cover member (100) to prevent thebobbin (210) from rotating. A portion of the rotation prevention part(120) may be accommodated into a groove concavely formed on an uppersurface of bobbin (210). The rotation prevention part (120) may be soformed as to be accommodated into a groove of bobbin (210) as to allowat least of a lateral part of the rotation prevention part (120) to bein contact with the bobbin (210) when the bobbin (210) is rotated.Through this structure, the rotation prevention part (120) can preventthe bobbin (210) from rotating.

The mover (200) may be movably supported relative to the stator (300).The mover (200) may move to an optical axis direction. The mover (200)may move integrally with a lens module through an electromagneticinteraction with the stator (300). The mover (200) may perform an autofocusing function by integrally moving with the lens module. The mover(200) may include a bobbin (210) and a driving coil (220). However, anyone or more of the bobbin (210) and the driving coil (220) may beomitted or changed from the mover (200).

The bobbin (210) may be disposed at an inside of housing (310). Thebobbin (210) may be accommodated into a groove (311) of housing (310).The bobbin (210) may be disposed at a groove (311) of housing (310). Thebobbin (210) may be spaced apart from the housing (310). The bobbin(210) may be disposed at an inside of housing (310). The bobbin (210)may be disposed with a driving coil (220). The bobbin (210) may bedisposed at an external circumferential surface thereof with the drivingcoil (220). The bobbin (210) may be coupled by a support member (600).The bobbin (210) may be coupled at an upper surface with an uppersupport member (610). The bobbin (210) may be coupled at a lower surfacewith a lower support member (620). The bobbin (210) may be disposed witha sensing magnet (710). The bobbin (210) may be disposed with acompensation magnet (730). The bobbin (210) may be disposed at one sidewith the sensing magnet (710) and may be disposed at the other side withthe compensation magnet (730). The bobbin (210) may be coupled with thelens module. The bobbin (210) may be coupled at an inner circumferentialsurface with an external circumferential surface of lens module. Thebobbin (210) may be moved to an optical axis direction relative to thehousing (310).

The bobbin (210) may include a hole (211), a coil reception groove(212), a sensing magnet reception part (230) and a compensation magnetreception part (240). However, any one or more of the hole (211), thecoil reception groove (212), the sensing magnet reception part (230) andthe compensation magnet reception part (240) may be omitted or changedfrom the bobbin (210).

The hole (211) may be coupled by the lens module. The hole (211) may beformed at an inner surface with a screw thread of a shape correspondingto that formed at an outside of the lens module. That is, the hole (211)may be screw-coupled with the lens module. An adhesive may be interposedbetween the lens module and the bobbin (210). At this time, the adhesivemay be an epoxy hardened by heat or UV. That is, the lens module and thebobbin (210) may be coupled by a UV-hardening epoxy and/orheat-hardening epoxy.

The coil reception groove (212) may be formed by being recessed inwardlyfrom an outside of the bobbin (210). The coil reception groove (212) maytake a shape corresponding to that of the driving coil (220). The coilreception groove (212) may be formed by being disposed at a positionmore inner side than that of the sensing magnet reception groove (239).In this case, the sensing magnet (710) accommodated into the sensingmagnet reception groove (239) may be disposed at a position more outsidethan that of the driving coil (220) accommodated into the coil receptiongroove (212). The coil reception groove (212) may be wound or mountedwith a driving coil (220). The coil reception groove (212) may becontinuously formed along an outside of the bobbin (210), or may beformed by being spaced apart at a predetermined distance. The coilreception groove (212) may be formed by allowing a portion of outside ofthe bobbin (210) to be inwardly recessed. At this time, the driving coil(220) may be directly wound on the coil reception groove (212). As amodification, the coil reception groove (212) may be formed by allowingan upper side or a lower side to be opened. At this time, the drivingcoil (220) may be inserted into and coupled with the coil receptiongroove (212) through the opened portion while being in a pre-woundstate.

An upper coupling part (213) may be coupled with the upper supportmember (610). The upper coupling part (213) may be coupled with an innerlateral part (612) of upper support member (610). The upper couplingpart (213) may be protrusively formed on an upper surface of bobbin(210). The protrusion of the upper coupling part (213) may be coupled bybeing inserted into a groove or a hole of the inner lateral part (612).At this time, the protrusion of the upper coupling part (213) may bemelted in a state of being inserted into a hole of the inner lateralpart (612) to fix the upper support member (610).

A lower coupling part (214) may be coupled with the lower support member(620). The lower coupling part (214) may be coupled with an innerlateral part (622) of the lower support member (620). The lower couplingpart (213) may be protrusively formed at a lower surface of bobbin(210). For example, the protrusion of the lower coupling part (214) maybe coupled by being inserted into a groove or a hole of an inner lateralpart (622). At this time, the protrusion of the lower coupling part(214) may be melted in a state of being inserted into a hole of theinner lateral part (622) to fix the lower support member (620).

A sensing magnet reception part (230) may be formed at one side ofbobbin (210). The sensing magnet reception part (230) may accommodate atleast one portion of sensing magnet (710). The sensing magnet receptionpart (230) may be formed by being recessed into the bobbin (210). Thesensing magnet reception part (230) may be symmetrically formed based onan optical axis of compensation magnet reception part (240).

The sensing magnet reception part (230) may include an upper supportpart (231), an upper open hole (232), a lower support part (233), alower open hole (234), a lateral support part (235), a support surface(236), a protrusion (237), a round part (238) and a sensing magnetreception groove (239). However, any one or more of the upper supportpart (231), the upper open hole (232), the lower support part (233), thelower open hole (234), the lateral support part (235), the supportsurface (236), the protrusion (237), the round part (238) and thesensing magnet reception groove (239) may be omitted or changed from thesensing magnet reception part (230).

The upper support part (231) may be disposed at an upper side of anupper surface of sensing magnet (710). The upper support part (231) maybe formed with an upper open hole (232). The upper support part (231)may support an upper surface of sensing magnet (710). A press-fittingtolerance between the upper support part (231) and an upper surface ofsensing magnet (710) may be 20 μm.

The upper open hole (232) may be formed at the upper support part (231).The upper open hole (232) may be formed at the upper support part (231)by passing through the upper support part (231). The upper open hole(232) may expose a portion of upper surface of sensing magnet (710) toan upper side. An adhesive may be infused into an upper surface ofsensing magnet (710) through the upper open hole (232).

The lower support part (233) may be disposed at a lower side of a lowersurface of sensing magnet (710). The lower support part (233) may beformed with a lower open hole (234). The lower support part (233) maysupport a lower surface of sensing magnet (710). An interference-fittolerance between the lower support part (232) and a lower surface ofsensing magnet (710) may be 20 μm.

The lower open hole (234) may be formed at the lower support part (233).The lower open hole (234) may be formed at the lower support part (233)by passing through the lower support part (233). The lower open hole(234) may expose a portion of lower surface of sensing magnet (710) to alower side. An adhesive may be infused into a lower surface of sensingmagnet (710) through the lower open hole (234).

The lateral support part (235) may support both lateral surfaces ofsensing magnet (710). The lateral support part (235) may include asupport surface (236), a protrusion (237) and a round part (238). Thelateral support part (235) may be respectively disposed at an uppersurface and a lower surface of sensing magnet (710). The lateral supportpart (235) disposed at a lower surface of sensing magnet (710) may bedisposed with a height of 0.25 mm. The lateral support part (235)disposed at an upper surface of sensing magnet (710) may be disposedwith a height of 0.44 mm.

The support surface (236) may face the both lateral surfaces of sensingmagnet (710). The support surface (236) may be in contact with the bothlateral surfaces of sensing magnet (710). The support surface (236) maysupport at least one portion of both lateral surfaces of sensing magnet(710).

The protrusion (237) may be protruded toward an outside when heading toa sensing magnet (710) side. The protrusion (237) may be disposed at amore outwardly position than that of the sensing magnet (710).

The round part (238) may be formed in a round manner at an area wherethe support surface (236) and an external surface of protrusion meet.The round part (238) may guide the sensing magnet (710) to be easilyinserted into a sensing magnet reception groove (239) when the sensingmagnet (710) is inserted from a lateral side of bobbin (210). That is,the round part (238) may guide that sensing magnet (710) to be insertedinto the sensing magnet reception groove (239).

The sensing magnet reception groove (239) may be formed by beinginwardly recessed from an outside of the bobbin (210). The sensingmagnet reception groove (239) may take a shape corresponding to that ofsensing magnet (710). The sensing magnet reception groove (239) mayaccommodate at least one portion of sensing magnet (710).

The compensation magnet reception part (240) may be formed at the bobbin(210). The compensation magnet reception part (240) may accommodate atleast one portion of compensation magnet (730). The compensation magnetreception part (240) may be formed at the other side of bobbincorresponding to an opposite side of one side of bobbin (210) formed bythe sensing magnet reception part (230). The compensation magnetreception part (240) may be symmetrically formed with the sensing magnetreception part (230) based on an optical axis. In this case, the sensingmagnet (710) accommodated into the sensing magnet reception part (230)and the compensation magnet (730) accommodated into the compensationmagnet reception part (240) may be symmetrical in terms of magnetism.Through this structure, an electromagnetic balance may be realizedbetween the sensing magnet (710) and the compensation magnet (730). As aresult, an influence affecting the electromagnetic interaction betweenthe sensing magnet (710) and the driving coil (220) can be minimized.The compensation magnet reception part (240) may be formed with a sizeand shape corresponding to those of the sensing magnet reception part(230). The compensation magnet reception part (240) may be disposed at aposition corresponding to that of the sensing magnet reception part(230) based on an optical axis.

The driving coil (220) may be disposed at the bobbin (210). The drivingcoil (220) may be formed on the bobbin (210). The driving coil (220) mayface the driving magnet (320). The driving coil (220) may interact withthe driving magnet (320). The driving coil (220) may electromagneticallyinteract with the driving magnet (320). The driving coil (220) may movethe bobbin (210) relative to the housing (310) through theelectromagnetic interaction with the driving magnet (320). The drivingcoil (220) may be overlapped with the sensing magnet (710) to adirection perpendicular to the optical axis. The driving coil (220) maybe disposed at an inside of the sensing magnet (710).

The driving coil may include at least one coil part. The driving coil(220) may be formed with a single coil to be guided to a coil receptiongroove (212) and may be wound on an outer circumferential surface ofbobbin (210). Furthermore, as a modification, the driving coil (220) maybe independently formed with four coil parts whereby the driving coil(220) may be disposed at an external surface of bobbin (210) to allowadjacent two coil parts to mutually form a 90°.

The driving coil (220) may include a pair of lead cables (not shown) inorder to supply an electric power. The pair of lead cables of drivingcoil (220) may be electrically connected to a first support unit (6201)and a second support unit (6202), both of which are a classificationelement of the lower support member (620).

A distal end of one side of the driving coil (220) may be electricallyconnected to the PCB through the first support unit (6201). The otherend of one side of the driving coil (220) may be electrically connectedto the PCB through the second support unit (6202). Alternatively, thedriving coil (220) may receive the power through the upper supportmember (610). When a power is supplied to the driving coil (220), anelectromagnetic field may be formed about the driving coil (220). As amodification, the bobbin (210) may be disposed with the driving magnet(320), and the housing (310) may be disposed with the driving coil(220). That is, the driving coil (220) and the driving magnet (320) maybe disposed by exchanging mutual positions.

The driving coil (220) may include first to fourth corner parts (221,222, 223, 224). The driving coil (220) may include a first corner part(221) adjacently disposed with the sensing magnet (710), a third cornerpart (223) adjacently disposed with the compensation magnet (730) andsecond and fourth corner parts (222, 224) interposed between the firstcorner part (221) and the third corner part (223). At this time, adistance (see L1 of FIG. 10) between the first corner part (221) and thethird corner part (223) may be shorter than a distance (see L2 of FIG.10) between second corner part (222) and the fourth corner part (224).An external side of the first corner part (221) of the driving coil(220) may be disposed with the sensing magnet (710) and an external sideof the third corner part (223) may be disposed with the compensationmagnet (730).

The stator (300) may be disposed at an external side of rotor (200). Thestator (300) may be selectively spaced apart from the rotor (200). Thestator (300) may be supported by a base (500) disposed thereunder.However, it may be explained that the rotor (200) includes the base(500) as a fixing member. The stator (300) may be disposed at an insidespace of cover member (100). The stator (300) can move the rotor (200)through an electromagnetic interaction. The stator (300) may include ahousing (310) and a driving magnet (320). However, any one or more ofthe housing (310) and the driving magnet (320) may be omitted or changedfrom the stator (300).

The housing (310) may be spaced apart from the bobbin (210). The housing(310) may be disposed at an outside of bobbin (210). The housing (310)may be disposed with a driving magnet (320). The housing (310) may becoupled by a substrate (400). The housing (310) may be disposed at anupper side of base (500). The housing (310) may be disposed on a base(500). The housing (310) may be coupled by a support member (600). Thehousing (310) may be coupled at an upper surface with an upper supportmember (610). The housing (310) may be disposed at a lower surface witha lower support member (620). The housing (310) may take a shapecorresponding to that of an inner lateral surface of cover member (100).A first corner part (305) of housing (310) may be disposed with a sensor(720). The housing (310) may be formed with an insulation material. Thehousing (310) may be formed with an injection material in considerationof productivity. As a modification, the housing (310) may be omitted anda driving magnet (320) may be directly fixed to the cover member (100).

The housing (310) may include first to fourth lateral surfaces (301,302, 303, 304). The first to fourth lateral surfaces (301, 302, 303,304) may be continuously disposed. The housing (310) may include firstto fourth corner parts (305, 306, 307, 308). The first to fourth cornerparts (305, 306, 307, 308) may be disposed among the first to fourthlateral surfaces (301, 302, 303, 304). The housing (310) may include alateral surface (301), a first corner part (305) disposed at one side offirst lateral surface (301), a second corner part (306) disposed at theother side of first lateral surface (301). The housing (310) may includea first lateral surface (301), a second lateral surface (302) adjacentto the first lateral surface (301), a third lateral surface (303)adjacent to the second lateral surface (302), a fourth lateral surface(304) adjacent to the third lateral surface (303), a first corner part(305) interposed between the first lateral surface (301) and the secondlateral surface (302), a second corner part (306) interposed between thesecond lateral surface (302) and the third lateral surface (303), athird corner part (307) interposed between third lateral surface (303)and the fourth lateral surface (304) and a fourth corner part (308)interposed between the fourth lateral surface (304) and the firstlateral surface (301). The housing (310) may include first to fourthlateral parts. The housing (310) may include first to fourth cornerparts (305, 306, 307, 308) disposed among the first to fourth lateralparts.

The housing (310) may include a hole (311), a magnet coupling part(312), a sensor reception part (330), a sensor substrate reception part(340) and a bond infusion hole (350). However, any one or more of thehole (311), the magnet coupling part (312), the sensor reception part(330), the sensor substrate reception part (340) and the bond infusionhole (350) may be omitted or changed from the housing (310).

The hole (311) may be formed at the housing (310). The hole (311) may beaccommodated into the bobbin (210). The hole (311) may be movablydisposed with the bobbin (210). The hole (311) may take a shapecorresponding to that of bobbin (210). An inner circumferential surfaceof housing (310) forming the hole (311) may be spaced apart from anouter circumferential surface of bobbin (210).

The magnet coupling part (312) may be formed at a lateral surface ofhousing (310). The magnet coupling part (312) may be formed with a shapecorresponding to that of driving magnet (320). The magnet coupling part(312) may fix the driving magnet (320) by accommodating the drivingmagnet (320). The magnet coupling part (312) may be formed by passingthrough a lateral surface of housing (310). Alternatively, the magnetcoupling part (312) may be formed by being recessed at an inner surfaceof housing (310). The magnet coupling part (312) may be disposed bybeing leaned toward a second corner part (306) side and a fourth cornerpart (308) side. That is, the magnet coupling part (312) may be disposedmore nearer to the second corner part (306) and the fourth corner part(308) than the first corner part (305) and the third corner part (307).Through this structure, an electromagnetic interference between thedriving magnet (320) coupled with the magnet coupling part (312) and thesensing magnet (710) and/or the compensation magnet (730) can beminimized.

The upper coupling part (313) may be coupled with the upper supportmember (610). The upper coupling part (313) may be coupled with an outerlateral part (611) of upper support member (610). The upper couplingpart (313) may be protrusively formed from an upper surface of housing(310). For example, the protrusion of upper coupling part (313) may becoupled by being inserted into a groove or a hole of the outer lateralpart (611). At this time, the protrusion of upper coupling part (313)may be melted while being inserted into a hole of the outer lateral part(611) to fix the upper support member (610).

The lower coupling part may be coupled with the lower support member(610). The lower coupling part may be coupled with an outer lateral part(621) of lower support member (620). The lower coupling part may beprotrusively formed from a lower surface of housing (310). Theprotrusion of lower coupling part may be coupled by being inserted intoa groove of a hole of outer lateral part (621). At this time, theprotrusion of lower coupling part may fix the lower support member (620)by being melted in a state of being inserted into a hole of outerlateral part (621). Alternatively, the outer lateral part (621) of lowersupport member (620) may be fixed in a method of being insertedlypressed between a lower surface of housing (310) and an upper surface ofbase (500).

The sensor reception part (330) may be formed at the housing (310). Thesensor reception part (330) may accommodate at least one portion ofsensor (720). The sensor reception part (330) may be formed by beinginwardly opened at the housing (310). The sensor reception part (330 mayinclude a lower guide part (331), an upper guide part (332), a lateralguide part (333) and an inner guide part (334). However, any one or moreof the lower guide part (331), the upper guide part (332), the lateralguide part (333) and the inner guide part (334) may be omitted from thesensor reception part (330).

The lower guide part (331) may contact a lower surface of sensor (720).The lower guide part (331) may surface-contact at least one surface oflower surface of sensor (720). The lower guide part (331) may support alower surface of sensor (720). The lower guide part (331) may preventthe sensor (720) from moving to a lower side. The lower guide part (331)may face a lower surface of sensor (720).

The upper guide part (332) may contact an upper surface of sensor (720).The upper guide part (332) may surface-contact at least one surface ofupper surface of sensor (720). The upper guide part (332) may support anupper surface of sensor (720). The upper guide part (332) may preventthe sensor (720) from moving to an upper side. The upper guide part(332) may face an upper surface of sensor (720).

The lateral guide part (333) may contact the other lateral surface ofboth lateral surfaces of sensor (720). The lateral guide part (333) maysurface-contact at least one portion of lateral surface of sensor (720).The lateral guide part (333) may support the other lateral surface ofboth lateral surfaces of sensor (720). The lateral guide part (333) mayprevent the sensor (720) from moving to the other lateral side of bothlateral sides. The lateral guide part (333) may face the other lateralside of both lateral sides. The movement of sensor (720) to one lateralside direction of both lateral side directions may be prevented by thesubstrate (400) being press-fitted to the housing (310). The movement ofsensor (720) to the other lateral side direction of both lateral sidedirections may be prevented by the lateral guide part (333).

The inner guide part (334) may contact one portion of sensor (720). Theinner guide part (334) may contact a portion of edge at an inner surfaceof sensor (720). The inner guide part (334) may surface-contact at leastone portion of inner surface at the sensor (720). The inner guide part(334) may support an inner surface of sensor (720). The inner guide part(334) may prevent the sensor from being moved to an inner side. Theinner guide part (334) may face an inner surface of sensor (720).

The sensor substrate reception part (340) may be formed on the housing(310). The sensor substrate reception part (340) may accommodate atleast one portion of substrate (400). The sensor substrate receptionpart (340) may be formed with a shape to correspond to that of at leastone portion of substrate (400). The sensor substrate reception part(340) may be formed by allowing a portion of housing (310) to berecessed. The sensor substrate reception part (340) may be formed byallowing an outer lateral surface of housing (310) to be recessedinwardly. The sensor substrate reception part (340) may be spaced apartfrom the magnet coupling part (312). The sensor substrate reception part(340) may include a coupling surface (341) and a slant surface (342).However, any one or more of the coupling surface (341) and the slantsurface (342) may be omitted or changed from the sensor substratereception part (340).

The coupling surface (341) may contact an outer surface of substrate(400). The coupling surface (341) may support an outer surface ofsubstrate (400). The slant surface (342) may be so slantly formed as toallow an upper surface of substrate (400) contacted to the couplingsurface (341) and a lower surface to be bent inwardly. The slant surface(342) may apply a pressure to at least one portion of substrate (400)inwardly through the slant structure. The slant surface (342) may beformed by being spaced apart on an upper surface and a lower surface ofcoupling surface (341). The slant surface (342) formed on an uppersurface of coupling surface (341) may be more recessed toward an outsidefrom an upper side while advancing to a lower side. The slant surface(342) formed on a lower surface of coupling surface (341) may beinwardly protruded while advancing to an upper side from a lower side.

The sensor substrate reception part (340) may include a first receptiongroove (316), a second reception groove (317) and a third receptiongroove (318). However, any one or more of the first reception groove(316), the second reception groove (317) and the third reception groove(318) may be omitted or changed from the sensor substrate reception part(340). The sensor substrate reception part (340) may include a firstreception groove (316) formed by being recessed from an inner lateralsurface of first corner part (305) at the housing (310) toward anoutside. The sensor substrate reception part (340) include a secondreception groove (317) formed by being recessed from an outer lateralsurface of first lateral part (301) at the housing (310) toward aninside. The sensor substrate reception part (340) may include a thirdreception groove (318) formed by being recessed from a lower surface offirst lateral surface (301) at the housing (310) toward an upper side.

The first reception groove (316) may be formed by being recessed from aninner lateral surface of first corner part (305) at the housing (310) toan outside. The first reception groove (316) may accommodate at leastone portion of sensor (720). The first reception groove (316) may beformed with a shape corresponding to that of sensor (720). The firstreception groove (316) and the second reception groove (318) maycommunicate each other. The first, second and third reception grooves(316, 317, 318) may communicate each other. The first, second and thirdreception grooves (316, 317, 318) may accommodate at least one portionof the substrate (400) and the sensor (720).

The second reception groove (317) may be formed by being recessed fromouter lateral surface of first lateral surface (301) of housing (310)toward an inner side. The second reception groove (317) may accommodateat least one portion of substrate (400). The second reception groove(317) may accommodate a body part (410) of substrate (400). The secondreception groove (317) may be formed with a shape corresponding to thatof at least one portion of substrate (400).

The third reception groove (318) may be formed by being recessed from alower surface of first lateral surface (301) of housing (310) to anupper side. The third reception groove (318) may accommodate at leastone portion of substrate (400). The third reception groove (318) may beformed by being more recessed to an upper side than the first receptiongroove (316). The third reception groove (318) may accommodate at leastone portion of substrate (400).

The bond infusion hole (350) may be formed between a lateral guide part(333) and a coupling surface (341). An adhesive may be infused betweenthe substrate (400) and the housing (310) through the bond infusion hole(350). The adhesive may be infused between an outer surface of substrate(400) and the coupling surface (341) through the bond infusion hole(350).

The driving magnet (320) may be formed at a housing (310). The drivingmagnet (320) may be disposed at the housing (310). The driving magnet(320) may face the driving coil (220). The driving magnet (320) may movethe bobbin (210) through an interaction with the driving coil (220). Thedriving magnet (320) may move the bobbin (210) through anelectromagnetic interaction with the driving coil (220). The drivingmagnet (320) may be fixed to the magnet coupling part (312) of housing(w310). The driving magnet (320) may be adhered to the housing (310) byan adhesive. The driving magnet (320) may include at least one magnet.The driving magnet (320) may include first to fourth magnet units (321,322, 323, 324), each spaced apart from the other. The driving magnet(320) may include a first magnet unit (321) disposed at the firstlateral surface (301), a second magnet unit (322) disposed at the secondlateral surface (302), a third magnet unit (323) disposed at a thirdlateral surface (303) and a fourth magnet unit (324) disposed at thefourth lateral surface (304). The first to fourth magnet units (321,322, 323, 324) may be spaced apart from each other. The first to fourthmagnet units (321, 322, 323, 324) may be disposed at the housing (310)to allow two adjacent magnet units to form an 90° angle therebetween.The first magnet unit (321) may be symmetrically disposed with the thirdmagnet unit (323) based on a center of housing (310). The second magnetunit (322) may be symmetrically formed with the fourth magnet unit (324)based on a center of housing (310).

The first magnet unit (321) may be disposed to be closer to the secondcorner part (306) than the first corner part (305). A center of firstmagnet unit (321) may be closer to the second corner part (306) than thefirst corner part (305) of housing (310). That is, the first magnet unit(321) may be disposed to be more leaned toward a second corner part(306) side. A center of second magnet unit (322) may be closer to thesecond corner part (306) than the third corner part (307) of housing(310). That is, the second magnet unit (322) may be disposed to be moreleaned toward a second corner part (306) side. A center of third magnetunit (323) may be closer to the fourth corner part (308) than the thirdcorner part (307) of housing (310). That is, the third magnet unit (323)may be disposed to be more leaned toward a fourth corner part (308)side.

A center of fourth magnet unit (324) may be closer to the fourth cornerpart (308) than the first corner part (305) of housing (310). That is,the fourth magnet unit (324) may be disposed to be more leaned toward afourth corner part (308) side. In this case, an electromagneticinterference between the first to fourth magnets (321, 322, 323, 324)and the sensing unit can be minimized. That is, an arranged space ofsensing magnet (710) can be secured through a shape and arrangedstructure of driving magnet (320) according to an exemplary embodiment.

The driving magnet (320) may be formed with four flat plate magnets. Thedriving magnet (320) may be disposed at a lateral surface of housing(310) and the sensor (720) may be disposed at a corner part of housing(310). The driving magnet (320) may be disposed at a lateral surface ofhousing (310) to be closer to a corner at one side.

The substrate (400) may be disposed at the housing (310). The substrate(400) may be coupled with the housing (310). The substrate (400) may becoupled by the sensor (720). The substrate (400) may be mounted with thesensor (720). The substrate (400) may be so formed as to be formed at alateral surface of one side of housing (310) and a corner. The substrate(400) may be so formed as allow the sensor (720) mounted on thesubstrate (400) to be disposed at a corner of housing (310). At leastone portion of substrate (400) may be accommodated into a sensorsubstrate reception part (340) of housing (310). The substrate (400) maybe press-fitted into the sensor substrate reception part (340) ofhousing (310). The substrate (400) may be fixed by an adhesive whilebeing inserted into a sensor substrate reception part (340) of housing(310). The substrate (400) may be such that a body part (410) may bedisposed at an outside of housing (310) while being inserted into thesensor substrate reception groove (340) and a sensor mounting part (420)may be disposed at an inner side of housing (310). Through thisstructure, a terminal part (430) disposed at a lower side of body part(410) may be easy to be electrically connected to an outside element,and the sensor (720) mounted on an inner lateral surface of sensormounting part (420) can detect the sensor magnet (710) disposed at aninner side at a high output. A portion of substrate (400) may beextended along a lateral surface at one side of base (500). The portionof substrate (400) and at least one portion of terminal part (624) maybe extended along a lateral surface at one side of base (500). Theportion of substrate (400) may be disposed at a second reception part(540) of base (500). The substrate (400) may be an FPCB (FlexiblePrinted Circuit Board). However, the present invention is not limitedthereto. A portion of the substrate (400) may be interposed between aterminal part (624) of first support unit (6201) and a terminal part(624) of second support unit (6202).

The substrate (400) may be disposed at an inner surface with a sensor(720). An external surface of substrate (400) may contact a couplingsurface (341) of housing (310). The external surface of substrate (400)may contact a coupling surface (341) of housing (310). The externalsurface of substrate (400) may be supported to the coupling surface(341) of housing (310). The external surface of substrate (400) may bepressed to an inner side by the slant surface (342) of housing (310) toan upper surface and a lower surface. The external surface of substrate(400) may be bent to an inner side from an upper surface and a lowersurface by the slant surface (342) of housing (310). Through thisstructure, the sensor (720) disposed at an inner side of substrate (400)may be pressed into an inner side. The sensor (720) pressed into theinner side is supported by an inner guide part (334) of housing (310) tostrongly fix the sensor (720). That is, the substrate (400) is pressedinto an inner side by the slant surface (342) of housing (310), wherebythe sensor (720) may be fixed at a normal position while being pressedto the inner guide part (334), even if there is an error in thickness ofsubstrate (400) per product, or even if there is an error on the sensorreception part (330) of housing (310).

The substrate (400) may include a body part (410), a sensor mountingpart (420) and a terminal part (430). However, any one or more of thebody part (410), the sensor mounting part (420) and the terminal part(430) may be omitted or changed from the substrate (400).

The body part (410) may be accommodated into the sensor substratereception part (340) of housing (310). The body part (410) may not beoverlapped with the driving magnet (320) to a direction perpendicular toan optical axis. A lateral surface at one side of body part (410) may beextended with the sensor mounting part (420). A lateral surface at theother side of body part (410) may be press-fitted into the housing(310). In the present exemplary embodiment, because a lateral surface atthe other side of body part (410) is press-fitted (coupled byinterference fit) into the housing (310), the sensor can be coupled withthe housing (310), only by mounting the sensor (720) on the sensormounting part (420), and inserting the sensor mounting part (420) intothe housing (310) and interference-fitting the body part (410) into thehousing (310).

The sensor mounting part (420) may be extended from the body part (410)onto a lateral surface of one side. The sensor mounting part (420) maybe coupled by the sensor (720). The sensor mounting part (420) may bemounted with the sensor (720). The sensor mounting part (420) may bebent from the body part (410). The sensor mounting part (420) may beaccommodated into the sensor substrate reception part (340) of housing(310).

The terminal part (430) may be downwardly extended from the body part(410). The terminal part (430) may be extended downwardly from a centerof a lateral surface of one side of housing (310). The terminal part(430) may be exposed to an outside. At least one portion of terminalpart (430) may be more protruded downwardly than the cover member (100).The terminal part (430) of substrate (400) may be disposed at a terminalpart (624) of lower support member (620).

The base (500) may be disposed at a lower side of bobbin (210). The base(500) may be disposed at a lower side of housing (310). The base (500)may support the stator (300). The base (500) may be disposed at a lowerside with a PCB. The base (500) may function as a sensor holderprotecting an image sensor mounted on the PCB.

The base (500) may include a hole (510), a body part (520), a firstreception part (530), a second reception part (540), a terminal part(550) and a foreign object collection part. However, any one or more ofthe hole (510), the body part (520), the first reception part (530), thesecond reception part (540), the terminal part (550) and the foreignobject collection part may be omitted or changed from the base (500).

The hole (510) may be formed at a position corresponding to that of hole(211) of bobbin (210). That is, the hole (510) may be formed to overlapwith the lens module to an optical axis direction. The hole (510) may becoupled with an infrared filter. However, as a modification, an infraredfilter may be coupled to a separate sensor holder disposed at a lowerside of base (500).

The body part (520) may be disposed at a lower side of bobbin (210). Thebody part (520) may be disposed at a lower side of housing (310). Thebody part (520) may support the housing (310). The body part (520) maybe coupled with the cover member (100). The body part (520) may bedisposed at an upper surface of PCB.

The first reception part (530) may be formed by being inwardly recessedfrom a lateral surface of an outside of the body part (520) at the base(500). The first reception part (530) may accommodate at least oneportion of terminal part (624) of the lower support member (620). Thefirst reception part (530) may surface-contact the terminal part (624).That is, the terminal part (624) may be extended along the firstreception part (530). The first reception part (530) may be disposed atboth sides of second reception part (540).

The second reception part (540) may be formed by being inwardly recessedfrom a lateral surface of an outside of the body part (520) at the base(500). The second reception part (540) may be formed by being moreinwardly recessed from a lateral surface of an outside of the body part(520) at the base (500) than the first reception part (530). That is,the second reception part (540) may be formed by being inwardly recessedfrom the first reception part (530). The second reception part (540) mayaccommodate at least one portion of terminal part (430) of substrate(400). The second reception part (540) may be surface-contacted byterminal part (430) of substrate (400). That is, the terminal part (430)of substrate (400) may be extended along the second reception part(540). The second reception part (540) may be interposed between twomutually spaced-apart first reception parts (530).

The terminal part (550) may support the cover member (100). The terminalpart (550) may support a lower end of the lateral plate (102) of covermember (100). The terminal part (550) may be accommodated with thelateral plate (102) of cover member (100). The terminal part (550) maybe protrusively formed from a lateral surface of body part (510) to anoutside. An adhesive may be coated between the cover member (100)accommodated on the terminal part (550) and a lateral surface of base(500).

The foreign object collection part may collect foreign objectsintroduced into the cover member (100). The foreign object collectionpart may be disposed at an upper surface of base (500). The foreignobject collection part may include an adhesive material. The foreignobject collection part may collect foreign objects in an inner spaceformed by the cover member (100) and the base (500).

The support member (600) may be coupled to the bobbin (210). The supportmember (600) may be coupled with the housing (310). The support member(600) may be coupled with the bobbin (210) and the housing (310). Thesupport member (600) may be coupled to the base (500). At least oneportion of support member (600) may have elasticity. The support member(600) may include an elastic member. The support member (600) maymovably support the bobbin (210). The support member (600) mayelastically support the bobbin (210). The support member (600) maymovably support the rotor (200) relative to the stator (300). Thesupport member (600) may movably support the bobbin (210) relative tothe housing (310). The support member (600) may movably support thebobbin (210) relative to the base (500). The support member (600) may bedisposed with a damper (not shown).

The support member (600) may include an upper support member (610) and alower support member (620). However, any one or more of the uppersupport member (610) and the lower support member (620) may be omittedor changed from the support member (600).

The upper support member (610) may be coupled to an upper surface ofbobbin (210) and to an upper surface of housing (310). The upper supportmember (610) may be integrally formed. At least one portion of uppersupport member (610) may have elasticity. The upper support member (610)may include an external part (611), an internal part (612) and aconnection part (613). However, any one or more of the external part(611), an internal part (612) and a connection part (613) may be omittedor changed from the upper support member (610).

The external part (611) may be coupled with the housing (310). Theexternal part (611) may be integrally formed. The external part (611)may be substantially formed with a square shape. The external part (611)may be coupled with the housing (310) at four areas.

The internal part (612) may be coupled with the bobbin (210). Theinternal part (612) may be integrally formed. The internal part (612)may be substantially formed with a round shape. The internal part (612)may be coupled with the bobbin (210) at eight areas.

The connection part (613) may connect the external part (611) and theinternal part (612). The connection part (613) may be formed by beingbent at least twice. The connection part (613) may have elasticity. Theconnection part (613) may elastically connect the external part (611)and the internal part (612).

The lower support member (620) may be coupled with a lower surface ofbobbin (210) and with a lower surface of housing (310). At least oneportion of lower support member (620) may have elasticity. The lowersupport member (620) may supply an electric power to the driving coil(220) by being divided to a pair of lower support member (620). Thelower support member (620) may include first and second support units(6201, 6202). The lower support member (620) may include the first andsecond support units (6201, 6202), each spaced apart and electricallyconnected to the driving coil (220). However, any one or more of thefirst and second support units (6201, 6202) may be omitted or changedfrom the lower support member (620).

The lower support member (620) may include an external part (621), aninternal part (622), a connection part (623) and a terminal part (624).However, any one or more of the external part (621), the internal part(622), the connection part (623) and the terminal part (624) may beomitted or changed from the lower support member (620).

The external part (621) may be coupled with the housing (310). Theexternal part (621) may be formed with two pieces, each being spacedapart from the other. The external part (621) may be fixed between thehousing (310) and the base (500). The external part (621) may include ahole coupled with a protrusion downwardly protruded from a lower surfaceof housing (310).

The internal part (622) may be coupled with the bobbin (210). Theinternal part (622) may be formed in two pieces, each spaced apart fromthe other. The internal part (622) may be substantially formed with asemi-circular shape. The internal part (622) may be coupled with thebobbin (210) at eight (8) areas.

The connection part (623) may connect the external part (621) and theinternal part (622). The connection part (623) may be bent at leasttwice. The connection part (623) may have elasticity. The connectionpart (623) may elastically connect the external part (621) and theinternal part (622).

The terminal part (624) may be extended from the external part (621).The terminal part (624) may be extended by being downwardly bent fromthe external part (621). A lower end of terminal part (624) may becoupled with a PCB. At least one portion of terminal part (624) may beextended along a lateral surface of one side of base (500). At least oneportion of terminal part (624) may be disposed at the first receptionpart (530). In the present exemplary embodiment, because the PCB mountedwith an image sensor is disposed with a terminal part (624) directlyconnecting the lower support member (620), a conductive line cansimplified and shortened over the lower support member (620) beingelectrically connected to the PCB through a substrate (400) to therebyreduce resistance generated in the course of supplying an electricityfor AF driving. Furthermore, in the present exemplary embodiment, thereis no process of coupling the lower support member (620) to thesubstrate (400) whereby workability can be enhanced and enhanced peakand increased productivity can be expected. Furthermore, reliability ofproduced products can be secured.

The sensing unit (700) may be provided by detecting position informationof lens module for autofocus feedback function. The sensing unit (700)may include a sensing magnet (710) and a sensor (720). The sensingmagnet (710) may be disposed at one side of bobbin (210). The sensor(720) may detect the sensing magnet (710) by being disposed at thehousing (310). Meantime, the compensation magnet (730) is a memberdisposed to form a magnetic balance with the sensing magnet (710) andtherefore may be interpreted as a member included in the sensing unit(700). Alternatively, the compensation magnet (730) may be interpretedas being a separate member from the sensing unit (700).

The sensing unit (700) may include a sensing magnet (710) and a sensor(720). However, any one or more of the sensing magnet (710) and thesensor (720) may be omitted or changed from the sensing unit (700).

The sensing magnet (710) may be disposed at the bobbin (210). Thesensing magnet (710) may be formed at the bobbin (210). The sensingmagnet (710) may be detected by the sensor (710). The sensing magnet(710) may be disposed at a corner of bobbin (210). The sensing magnet(710) may be disposed at a first corner part (221) of bobbin (210). Thesensing magnet (710) may be so disposed as to face the first corner part(305) of housing (310). The sensing magnet (710) may be disposed on animaginary straight line based on a center of bobbin (210). The sensingmagnet (710) may be symmetrical with the compensation magnet (730) basedon a center of bobbin (210). The sensing magnet (710) may have magnetismcorresponding to that of the compensation magnet (730). The sensingmagnet (710) may be disposed at one side of bobbin (210). The sensingmagnet (710) may be overlapped with the driving coil (220) to adirection perpendicular to an optical axis.

The sensing magnet (710) may be disposed at an outside of driving coil(220). The sensing magnet (710) may be interposed between the drivingcoil (220) and the sensor (720). In this case, a distance between thesensing magnet (710) and the sensor (720) can be closer over a casewhere the sensing magnet (710) is disposed at an inside of the drivingcoil (220) to thereby increase a detection value detected by the sensor(720). The sensing magnet (710) may be disposed in consideration ofrelative position so that the sensing magnet (710) can use only asection where four poles are magnetized to allow a Hall output to beoutputted in a positive number. The sensing magnet (710) may be soformed as to allow an upper inner side to have S pole, an upper outerside to have N pole, an inner lower side to have N pole and an outerlower side to have S pole, for example, as illustrated in FIG. 4.

An upper surface and a lower surface of sensing magnet (710) may befixed to the bobbin (210). The upper surface of sensing magnet (710) maybe fixed to the bobbin (210). The lower surface of sensing magnet (710)may be fixed to the bobbin (210). A portion of upper surface of sensingmagnet (710) may be fixed to the bobbin (210). The other remainingportion of upper surface of sensing magnet (710) may be opened. Aportion of lower surface of sensing magnet (710) may be fixed to thebobbin (210). The other remaining portion of lower surface of sensingmagnet (710) may be opened. The upper surface and a lower surface ofsensing magnet (710) may be correspondingly form-fitted (

) to the bobbin (210). The upper surface and a lower surface of sensingmagnet (710) may be coupled to the bobbin (210). At least one portion ofupper surface of sensing magnet (710) and at least one portion of lowersurface of sensing magnet (710) may be fixed to the bobbin (210) usingan adhesive. At least one portion of upper surface of sensing magnet(710) may be fixed to the bobbin (210) using an adhesive. At least oneportion of lower surface of sensing magnet (710) may be fixed to thebobbin (210) using an adhesive. At least one portion of upper surface ofsensing magnet (710) and at least one portion of lower surface ofsensing magnet (710) may be coupled to the bobbin (210) using anadhesive. In the present exemplary embodiment, because both an uppersurface and a lower surface of sensing magnet (710) are fixed to thebobbin (210), a position of sensing magnet (710) to an optical axisdirection (vertical direction, z axis direction, horizontal direction)may be constantly maintained in all products even if amount of adhesivecoated between the sensing magnet (710) and the bobbin (210) is notconstant per product in the course of manufacturing process.

At least one portion of upper surface of sensing magnet (710) may beexposed to an upper side through an upper open hole (232). The uppersurface of sensing magnet (710) may be fixed to the bobbin (210) by anadhesive infused through the upper open hole (232). The lower surface ofsensing magnet (710) may be fixed to the bobbin (210) by an adhesiveinfused through a lower open hole (234). The adhesive infused throughthe upper open hole (232) and the lower open hole (234) may bepenetrated between the magnet (710) and the bobbin (210) by the osmoticpressure.

The sensing magnet (710) may be spaced apart from the driving coil(220). The sensing magnet (710) may be spaced apart from the drivingcoil (220) by 80 μm. In this case, even if there is a defect in thewinding of driving coil (220), the sensing magnet (710) can be spacedapart from the driving coil (220).

An upper end of sensing magnet (710) may be disposed at a positionhigher than an upper end of coil (220). The lower end of sensing magnet(710) may be disposed at a position lower than a lower end of coil(220). The sensor (720), the sensing magnet (710) and the coil (220) maybe arranged on an imaginary straight line.

The sensor (720) may be disposed at the housing (310). The sensor (720)may be formed at the housing (310). The sensor may be disposed at acorner part of housing (310). The sensor (720) may be formed at a firstcorner part (305) of housing (310). The sensor (720) may be disposed atthe substrate (400). The sensor (720) may be coupled with the substrate(400). The sensor (720) may be electrically connected to the substrate(400). The sensor 9720) may be mounted on the substrate (400). Thesensor (720) may be coupled to the substrate (400) by an SMT (SurfaceMounter Technology). The sensor (720) may be mounted on a sensormounting part (420) of substrate (400). The sensor (720) may detect thesensing magnet (710). The sensor (720) may be disposed at a first cornerpart (305) of housing (310). The sensor (720) may be disposed on animaginary straight line connecting the first corner part (305) and athird corner part (307). That is, the sensor (710), the sensing magnet(720) and the compensation magnet (730) may be all disposed on animaginary straight line connecting the first corner part (305) and thethird corner part (307) of housing (310). The sensor (720) may include aHall sensor (Hall IC) detecting a magnetic field of magnet.

The Hall sensor may be fixed to the housing (310) and the sensing magnet(710) may be fixed to the bobbin (210). When the sensing magnet (710) ismoved along with the bobbin (210), a magnetic flux density detected bythe Hall element inside the Hall sensor may be changed in response to arelative position of Hall sensor and the sensing magnet (710). The Hallsensor may detect a position of lens module using an output voltage ofHall sensor proportional to a magnetic flux density that changes inresponse to the relative position of Hall sensor and sensing magnet(710).

An upper surface and a lower surface of sensor (720) may be fixed to thehousing (310). The upper surface of sensor (720) may be fixed to thehousing (310). The lower surface of sensor (720) may be fixed to thehousing (310). A portion of upper surface of sensor (720) may be fixedto the housing (310). The remaining other portion of upper surface ofsensor (720) may be opened. A portion of lower surface of sensor (720)may be fixed to the housing (310). The remaining portion of lowersurface of sensor (720) may be opened. The upper surface and the lowersurface of sensor (720) may be correspondingly form-fitted (

) to the housing (310). The upper surface and the lower surface ofsensor (720) may be coupled to the housing (310). At least one portionof upper surface of sensor (720) and at least one portion of lowersurface of sensor (720) may be fixed to the housing (310) using anadhesive. At least one portion of upper surface of sensor (720) may befixed to the housing (310) using an adhesive. At least one portion oflower surface of sensor (720) may be fixed to the housing (310) using anadhesive. At least one portion of upper surface of sensor (720) and atleast one portion of lower surface of sensor (720) may be coupled to thehousing (310) using an adhesive. In the present exemplary embodiment,because both the upper surface and a lower surface of sensor (720) arefixed to the housing (310), a position of sensor (720) to an opticalaxis direction (vertical direction, z axis direction, horizontaldirection) may be constantly maintained in all products even if amountof adhesive coated between the sensor (720) and the housing (310) is notconstant per product in the course of manufacturing process.

One lateral surface of both lateral surfaces of sensor (720) may beopened. One lateral surface of both lateral surfaces of sensor (720) maynot be coupled to the housing (310). One lateral surface of both lateralsurfaces of sensor (720) may not be contacted to the housing (310). Theother lateral surface of both lateral surfaces of sensor (720) may befixed by being in close contact with the housing (310). The otherlateral surface of both lateral surfaces of sensor (720) may besurface-contact a lateral guide part (333) of housing (310). Thecharacteristics thus described may be generated because the sensor (7200is slidingly coupled to the housing (310) from a lateral direction. Thatis, in the present exemplary embodiment, the sensor (720) may be coupledby being inserted between a lower guide part (331) and an upper guidepart (332) from a lateral side of housing (310) using a sliding methodwhile being coupled to the substrate (400).

An least one surface among the upper surface, a lower surface, the otherlateral surface (opposite to one surface) of the both lateral surfacesand an inner surface may be fixed to the housing (310) by an adhesive.An least one surface among the upper surface, a lower surface, the otherlateral surface (opposite to one surface) of the both lateral surfacesand an inner surface may be coupled to the housing (310) by an adhesive.An least one surface among the upper surface, a lower surface, the otherlateral surface (opposite to one surface) of the both lateral surfacesand an inner surface may be directly contacted to the housing (310) byan adhesive.

The lens driving device according to an exemplary embodiment may furthercomprise a compensation magnet (730). The compensation magnet (730) maybe provided to implement a magnetic force balance with the sensingmagnet (710). The compensation magnet (730) may be disposed at thebobbin (210). The compensation magnet (730) may be accommodated into acompensation magnet reception part (240) of bobbin (210). Thecompensation magnet (730) may be disposed to be symmetrical with thesensing magnet (710) base on a center of optical axis. The compensationmagnet (730) may be symmetrical with the sensing magnet (710) based on acenter of optical axis. The compensation magnet (730) may be formed witha magnetism corresponding to that of sensing magnet (710). Thecompensation magnet (730) may be disposed at the other side of bobbin(210) corresponding to an opposite side of one side of bobbin (210)where the sensing magnet (710) is situated. The compensation magnet(730) may be disposed on an imaginary straight line connecting the firstcorner part (305) and the third corner part (307). The compensationmagnet (730) may be symmetrically disposed based on a center of thesensing magnet (710) and the bobbin (210). Through this structure, theremay be implemented an electromagnetic balance between the sensing magnet(710) and the compensation magnet (730). As a result, an influenceaffected to the electromagnetic interaction between the sensing magnet(710) and the driving coil (220) may be minimized.

In the exemplary embodiment, the sensing magnet (710) and the sensor(720) may be assembled on a normal position to an optical axisdirection. The sensing magnet (710) and the sensor (720) in theexemplary embodiment are elements for autofocus feedback, such that itis necessary to accurately detect the movement to an optical axisdirection of bobbin (210) fixed by the lens module. Meantime, theproblem was that the sensing magnet (710) and the sensor (720) wereconventionally assembled by being deviated to an optical axis directionfrom a normal position in response to manufacturing dimensions, errors,assembly tolerance and amount of coated adhesive. In this case, themovement of bobbin (210) to an optical axis direction is detected to beerroneous, the auto focus feedback was not properly operated. In thepresent exemplary embodiment, as explained above, the sensing magnet(710) and the sensor (720) are assembled on a normal position to theoptical axis direction, whereby the conventional problem can beovercome.

Hereinafter, operation of camera module according to an exemplaryembodiment will be described.

To be more specific, the auto focus function of camera module accordingto an exemplary embodiment will be explained.

When an electric power is supplied to a driving coil (220), the drivingcoil (220) may move relative to the driving magnet (320) through theelectromagnetic interaction between the driving coil (220) and thedriving magnet (320). At this time, the bobbin (210) coupled by thedriving coil (220) may integrally move with the driving coil (220). Thatis, the bobbin (210) coupled therein with the lens module may move to anoptical axis direction relative to the housing (310). This movement ofbobbin (210) may result in the lens module moving closely to ordistantly from the image sensor, whereby the focus adjustment on asubject can be implemented by supplying an electric power to the drivingcoil (220) according to the present exemplary embodiment of the presentinvention.

Meanwhile, the camera module according to the present exemplaryembodiment of the present invention may be applied with an auto focusfeedback in order to implement a more accurate auto focus function. Thesensor (720) disposed at the housing (310) may detect a magnetic fieldof sensing magnet (710) fixed to the bobbin (2210). Thus, when thebobbin (210) implements a relative movement to the housing (310), adistance between the sensor (720) and the sensing magnet (710) may bechanged to thereby change the amount of magnetic field detected by thesensor (720). The sensor (720) may transmit a detection value to thecontroller by detecting a movement of optical axis direction of bobbin(210) or a position of bobbin (210) using the abovementioned method. Thecontroller may determine whether to implement an additional movementrelative to the bobbin (210) through the received detected value. Theseseries of processes are generated in real time, whereby the auto focusfunction of camera module according to the present exemplary embodimentcan be more accurately performed through the auto focus feedback.

The abovementioned exemplary embodiments have been explained by anautofocus function-enabled AF models. However, in modifications to theexemplary embodiments, the housing (310) and the bobbin (210) may bespaced apart, and the lateral support member may movably support thehousing (310) relative to the bobbin (210), and an OIS coil part may bedisposed to face the driving magnet (320) at an upper surface of base(500). That is, the modifications to the exemplary embodiments may beimplemented with an OIS function along with the auto focus function.

FIGS. 19 to 31 illustrate a second exemplary embodiment of presentinvention.

Hereinafter, any one of the driving coil (1220) and the driving magnet(1320) may be called a “first driving part”, and remaining one may becalled a “second driving part”. Hereinafter, in an exemplary embodimentof the present invention, although a structure of the driving coil(1220) being disposed at the bobbin (1210) and the driving magnet (1320)being disposed at the housing (1310) is to be explained, the drivingcoil (1220) may be disposed at the housing (1310) and the driving magnet(1320) may be disposed at the bobbin (1210) according to a modificationof the present invention.

Hereinafter, one of a driving magnet (1320), a sensing magnet (1710) anda compensation magnet (1720) may be called a “first magnet” and anothermay be called a “second magnet” and the remaining one may be called a“third magnet”.

Although the exemplary embodiments in the following description haveexplained that a lower support member (1620) is electrically connectedto a substrate (1400), any one or more of the lower support member(1620) and the upper support member (1610) may be electrically connectedto the substrate (1400) as a modification to the present invention. Theelectrically conductive structure between the upper support member(1610) and the substrate (1400) in the modification of the presentinvention may be inferably applied to an explanation of an electricallyconductive structure between the lower support member (1620) and thesubstrate (1400). Hereinafter, a first pad (1441) and a second pad(1442) may be collectively called a “terminal (1441, 1442)”.

Hereinafter, configuration of lens driving device according to a firstexemplary embodiment of present invention will be described withreference to accompanying drawings.

FIG. 19 is a perspective view illustrating a lens driving deviceaccording to a first exemplary embodiment of present invention, FIG. 20is an exploded perspective view illustrating a lens driving deviceaccording to a first exemplary embodiment of present invention, FIG. 21is a perspective view illustrating a housing of a lens driving deviceaccording to an exemplary embodiment of present invention, FIG. 22 is aperspective view illustrating a coupled state between a housing of alens driving device and a substrate according to a first exemplaryembodiment of the present invention, FIG. 23 is a bottom perspectiveview illustrating a coupled state between a housing of a lens drivingdevice and a substrate according to a first exemplary embodiment of thepresent invention, FIG. 24 is a cross-sectional view taken along lineA-A of FIG. 1, FIG. 25 is a plane view illustrating some elements of alens driving device according to a first exemplary embodiment of presentinvention, FIG. 26 is a perspective view illustrating a lower supportmember of a lens driving device according to a first exemplaryembodiment of the present invention, FIG. 27 is a bottom perspectiveview illustrating a coupled state between a lower support member of alens driving device and a substrate according to a first exemplaryembodiment of the present invention, and FIG. 28 is a bottom perspectiveview illustrating some elements of a lens driving device according to afirst exemplary embodiment of present invention.

The lens driving device according to a first exemplary embodiment ofpresent invention may include a cover member (1100), a mover (1200), astator (1300), a substrate (1400), a base (1500), a support member(1600) and a sensing unit. However, any one or more of the cover member(1100), the mover (1200), the stator (1300), the substrate (1400), thebase (1500), the support member (1600) and the sensing unit may beomitted or changed from the lens driving device according to the presentexemplary embodiment. Particularly, the sensing unit may be omitted asan element for auto focus feedback function.

The cover member (1100) may form an exterior look of the lens drivingdevice. The cover member (1100) may take a bottom-opened cubic shape.However, the present invention is not limited thereto.

The cover member (1100) may be formed with a metal material. To be morespecific, the cover member (1100) may be formed with a metal plate. Inthis case, the cover member (1100) can shield an EMI (Electro MagneticInterference). Because of the characteristics of the cover member (1100)thus described, the cover member (1100) may be called an “EMI shieldcan”. The cover member (1100) may shield the electromagnetic wavesgenerated from an outside of the lens driving device from entering intothe cover member (1100). Furthermore, the cover member (1100) mayprevent the electromagnetic waves generated from inside of the covermember (0100) from being emitted to an outside of the cover member(1100). However, the material of the cover member (1100) is not limitedthereto.

The cover member (1100) may include an upper plate (1101) and a lateralplate (1102). The cover member (1100) may include an upper plate (1101)and a lateral plate (1102) extended downwardly from an outside of theupper plate (1101). A lower end of the lateral plate (1102) at the covermember (1100) may be mounted on a base (1500). The cover member (1100)may be mounted at an inner lateral surface on the base (1500) by beingin close contact, in part or in whole, with a lateral surface of base(1500). An inner space formed by the cover member (1100) and the base(1500) may be disposed with a mover (1200), a stator (1300) and asupport member (1600). Through this type of structure, the cover member(1100) may protect an inner element from the outside shock or, at thesame time, prevent the infiltration of outside pollution materials.However, a lower end at the lateral plate (1102) of cover member (1100)may be directly coupled with a PCB disposed at a lower side of base(1500).

The cover member (1100) may include an opening (1110) formed at theupper plate (1101) to expose the lens module. The opening (1110) may beformed with a shape corresponding to that of the lens module. Theopening (110) may be formed to be larger in size than a diameter of thelens module to allow the lens module to be assembled through the opening(1110). Meantime, a light introduced into through the opening (1110) maypass through the lens module. At this time, the light having passed thelens module may be obtained by an image sensor as an image.

The cover member (1100) may include a rotation prevention part (1120)extended from an inner side of the upper plate (101) to a lower side toprevent the bobbin (1210) from rotating. The rotation prevention part(1120) may be accommodated into a groove of bobbin (1210) to allow atleast one portion of lateral surface of rotation prevention part (1120)to be in contact with the bobbin (1210) when the bobbin (1210) rotates.

The mover (200) may include a bobbin (1210) and a driving coil (1220).The mover (1200) may include a bobbin (1210) coupled by the lens module.The mover (1200) may include a bobbin (1210) disposed at an inside ofthe housing (1310). The mover (1200) may include a driving coil (1220)disposed at the bobbin (1210). The mover (1200) may include a drivingcoil (1220) facing a driving magnet (1320). The mover (1200) mayintegrally move along with the lens module through an electromagneticinteraction with the stator (1300).

The bobbin (1210) may be disposed at an inside of the housing (1310).The bobbin (1210) may be disposed with a driving coil (1220). The bobbin(1210) may be coupled with the support member (1600). An upper surfaceof bobbin (1210) may be coupled by an upper support member (1610). Alower surface of bobbin (1210) may be coupled with a lower supportmember (1610). The bobbin (1210) may be disposed with a sensing magnet(1710). The bobbin (1210) may be disposed at one side with a sensingmagnet (1710), and may be disposed at the other side with a compensationmagnet (1720). The bobbin (1210) may be coupled with the lens module. Aninner surface of bobbin (1210) may be coupled with an outer surface oflens module. The bobbin (1210) may move to an optical axis directionrelative to the housing (1310).

The bobbin (1210) may include a lens coupling part (1211), a firstdriving part coupling part (1212), an upper coupling part (1213), alower coupling part (1214), a sensing magnet reception part (1215) and acompensation magnet reception part (1216).

The bobbin (1210) may include a lens coupling part (1211) formedthereinside. The lens coupling part (1211) may be coupled with the lensmodule.

An inner peripheral surface of lens coupling part (1211) may be formedwith a screw thread in a shape corresponding to that of a screw threadformed at an outer peripheral surface of the lens module. That is, thelens coupling part (1211) may be screw-connected with the lens module.An adhesive may be interposed between the lens module and the bobbin(1210). At this time, the adhesive may be an epoxy cured by a UV orheat. Furthermore, the lens module and the bobbin (210) may be bonded bya UV-curing and/or a heat-curing epoxy.

The bobbin (1210) may include a first driving part coupling part (1212)wound by or mounted with a driving coil (1220). The first driving partcoupling part (1212) may be integrally formed with an outercircumferential surface of bobbin (1210). Furthermore, the first drivingpart coupling part (1212) may be continuously formed along the outercircumferential surface of bobbin (1210) or may be spaced apart at apredetermined distance. For example, the first driving part couplingpart (1212) may be formed by allowing a portion of the outercircumferential surface of bobbin (1210) to be correspondingly recessedwith a shape of the driving coil (1220). At this time, the driving coil(1220) may be directly wound on the first driving part coupling part(1212). As a modification, the first driving part coupling part (1212)may be formed with an upper side or a lower side being opened. At thistime, the driving coil (1220) may be insertedly coupled with the firstdriving part coupling part (1212) through the opened area while being ina pre-wound state.

The bobbin (1210) may include an upper coupling part (1213) coupled withthe upper support member (1610). The upper coupling part (1213) may becoupled with an internal part (1612) of upper support member (1610). Forexample, a protrusion of upper coupling part (1213) may be coupled bybeing inserted into a hole or a groove of the internal part (1612). Atthis time, the protrusion of upper coupling part (1213) may be meltedwhile being inserted into the hole of internal part (1612) to therebyfix the upper support member (1610).

The bobbin (1210) may include a lower coupling part (1214) coupled withthe lower support member (1620). The lower coupling part (1214) may becoupled with an internal part (1622) of lower support member (1620). Forexample, a protrusion of lower coupling part (1214) may be coupled bybeing inserted into a hole or a groove of the internal part (1622). Atthis time, the protrusion of lower coupling part (1214) may fixe thelower support member (1620) by being melted while being inserted intothe hole of the internal part (1622).

The bobbin (1210) may include a sensing magnet reception part (1215)accommodated by a sensing magnet (1710). The sensing magnet receptionpart (1215) may be integrally formed at one side of bobbin (1210). Thesensing magnet reception part (1215) may accommodate the sensing magnet(1710). The sensing magnet reception part (1215) may be formed by beinginwardly recessed from the first driving part coupling part (1212).

The bobbin (1210) may include a compensation magnet reception part(1216) accommodated by a compensation magnet (1720). The compensationmagnet reception part (1216) may be formed at the other side of bobbin(1210) corresponding to an opposite side of one side of the bobbin(1210) formed by the sensing magnet reception part (1215). Thecompensation magnet reception part (1216) may accommodate thecompensation magnet (1720). The compensation magnet reception part(1216) may be formed by being inwardly recessed from the first drivingpart coupling part (1212). The compensation magnet reception part (1216)may be disposed to be symmetrical with the sensing magnet reception part(1215) from a center of bobbin (1210). In this case, the magnetism ofsensing magnet (1710) accommodated into the sensing magnet receptionpart (1215) and the magnetism of compensation magnet (1720) accommodatedinto the compensation magnet reception part (1216) may be symmetrical.Through this structure, an electromagnetic balance may be realizedbetween the sensing magnet (1710) and the compensation magnet (1720). Asa result, an influence may be minimized that is affected by the sensingmagnet (1710) to an electromagnetic interaction between the driving coil(1220) and the driving magnet (1320).

The driving coil (1220) may be disposed at the bobbin (1210). Thedriving coil (1220) may face the driving magnet (1320). The driving coil(1220) may interact with the driving magnet (1320). The driving coil(1220) may electromagnetically interact with the driving magnet (1320).The driving coil (1220) may move the bobbin (1210) relative to thehousing (1310) through the electromagnetic interaction with drivingmagnet (1320). The driving coil (1220) may be overlapped with thesensing magnet (1710) to a direction perpendicular to an optical axis.The driving coil (1220) may be disposed at an outside of the sensingmagnet (1710).

The driving coil (1220) may include at least one coil. The driving coil(1220) may be guided to the first driving part coupling part (1212) bybeing formed with a single coil to be wound on an outside of the bobbin(1210). Furthermore, as a modification, the driving coil (1220) may beformed with four independent coils to allow being disposed at an outsideof bobbin (1210) so that two adjacent coils can mutually form a 90°angle.

The driving coil (1220) may include a pair of lead cables (not shown) inorder to supply an electric power. The pair of lead cables of drivingcoil (1220) may be electrically connected to a first support unit (1620a) and a second support unit (1620 b), both of which are classificationelements of the lower support member (1620).

A distal end of one side of the driving coil (1220) may be electricallyconnected to a substrate (1740) through the first support unit (1620 a).The other end of one side of the driving coil (1220) may be electricallyconnected to the substrate (1740) through the second support unit (1620b). Alternatively, the driving coil (1220) may receive the power throughthe upper support member (1610). Meantime, when a power is supplied tothe driving coil (1220), an electromagnetic field may be formed aboutthe driving coil (1220). As a modification, the bobbin (1210) may bedisposed with the driving magnet (1320), and the housing (1310) may bedisposed with the driving coil (1220). That is, the driving coil (1220)and the driving magnet (1320) may be disposed by exchanging mutualpositions.

The stator (1300) may be disposed at an outside of mover (1200). Thestator (1300) may be selectively spaced apart from the mover (1200). Thestator (1300) may be supported by the base (1500) disposed at a lowerside. However, it may be also explained that the base (1500) is a fixedmember and the stator (1300) includes the base (1500). The stator (1300)may be disposed at an inner space of the cover member (1100). The stator(1300) may move the mover (1200) through the electromagneticinteraction.

The stator (1300) may include a housing (1310) disposed at an outside ofbobbin (1210). The stator (1300) may include a driving magnet (1320)disposed opposite to the driving coil (1220) and fixed to the housing(1310). The housing (1310) may be spaced apart from the bobbin (1210).The housing (1310) may be disposed at an outside of bobbin (1210). Thehousing (1310) may be coupled with the substrate (1400). The housing(1310) may be disposed with a driving magnet (1320). The housing (1310)may be coupled with the support member (1600). The housing (1310) may becoupled at an upper surface with an upper support member (1610). Thehousing (1310) may be coupled at a lower surface with a lower supportmember (1620). The housing (1310) may be formed with a shapecorresponding to that of an inner surface of cover member (1100). Thehousing (1310) may be formed with an insulation material. The housing(1310) may be formed with an injection mold in consideration ofproductivity. The housing (1310) may be fixed on the base (1500).Alternatively, the housing (1310) may be omitted and the driving magnet(1320) may be directly fixed to the cover member (1100).

The housing (1310) may include continuously disposed first to secondlateral surfaces (1301, 1302, 1303, 1304). The housing (1310) mayinclude first to fourth corner parts (1305, 1306, 1307, 1308), eachspaced apart from the other. The housing (1310) may include a firstcorner part (1305) disposed between first and second lateral surfaces(1301, 1302). The housing (1310) may include a second corner part (1306)interposed between the second and third lateral surfaces (1302, 1303).The housing (1310) may include a third corner part (1307) interposedbetween the third and fourth lateral surfaces (1303, 1304). The housing(1310) may include a fourth corner part (1308) interposed between thefourth and first lateral surfaces (1304, 1301). At this time, the firstcorner part (1305) may be disposed with a sensor (1730). However, thepresent invention is not limited thereto.

The housing (1310) may include an inner space (1311), a second drivingpart coupling part (1312), an upper coupling part (1313), a lowercoupling part (not shown) and a sensor substrate reception part (1315).The housing (1310) may be opened at an upper side and a lower side tomovably accommodate the bobbin (1210) to an optical axis direction. Thehousing (1310) may include therein an inner space (1311). The innerspace (1311) may be movably disposed with a bobbin (1210). That is, theinner space (1311) may be formed with a shape corresponding to that ofthe bobbin (1210). Furthermore, an inner surface of housing (1310)forming the inner space (1311) may be spaced apart from an outer surfaceof the bobbin (1210).

The housing (1310) may include at a lateral surface a second drivingpart coupling part (1312) formed in a shape corresponding to that of thedriving magnet (1320) to accommodate the driving magnet (1320). Thesecond driving part coupling part (1312) may fix the driving magnet(1320) by accommodating the driving magnet (1320). The second drivingpart coupling part (1312) may be formed by passing through a lateralsurface of housing (1310). Alternatively, the second driving partcoupling part (1312) may be formed by being recessed on an inner surfaceof housing (1310). The second driving part coupling part (1312) may bedisposed by being leaned toward a second corner part (1306) side and toa fourth corner part (1308) side. Through this structure, anelectromagnetic interference between the driving magnet (1320) coupledto the second driving part coupling part (1312) and the sensing magnet(1710) and/or the compensation magnet (1720) may be minimized.

The housing (1310) may include an upper coupling part (1313) coupledwith the upper support member (1610). The upper coupling part (1313) maybe coupled with an external part (1611) of upper support member (1610).For example, a protrusion of the upper coupling part (1313) may becoupled by being inserted into a hole or a groove of the external part(1611). At this time, the protrusion of upper coupling part (1313) maybe melted to fix the upper support member (1610) while being insertedinto a hole of the external part (1611).

The housing (1310) may include a lower coupling part coupled with thelower support member (1620). The lower coupling part may be coupled withan external part (1621) of lower support member (1620). At this time,the protrusion of lower coupling part may be melted to fix the lowersupport member while being inserted into a hole of an external part(1621). Alternatively, the external part (1621) of lower support member(1620) may be inserted between a lower surface of housing (1310) and anupper surface of base (1500) and fixed by a pressing method.

The housing (1310) may be formed with a sensor substrate reception part(1315). The sensor substrate reception part (1315) may be formed on thehousing (1310). The sensor substrate reception part (1315) mayaccommodate at least one portion of substrate (1400). The sensorsubstrate reception part (1315) may include a first reception groove(1316) formed by being outwardly recessed from an inner surface of firstcorner part (1305). The sensor substrate reception part (1315) mayinclude a second reception groove (1317) formed by being inwardlyrecessed from an outer surface of first lateral surface (1301) ofhousing (1310). The sensor substrate reception part (1315) may include athird reception groove (1318) formed by being upwardly recessed from alower surface of first lateral surface (1301) of housing (1310).

The first reception groove (1316) may be formed by being outwardlyrecessed from an inner surface of first corner part (1305) of housing(1310). The second reception groove (1317) may be formed by beinginwardly recessed from an outer surface of first lateral surface (1301)of housing (1310). The first reception groove (1316) and the secondreception groove (1317) may be mutually communicated. The thirdreception groove (1318) may be formed by being upwardly recessed from alower surface of first lateral surface (1301) of housing (1310). Thefirst, second and third reception grooves (1316, 1317, 1308) may bemutually communicated. The first, second and third reception grooves(1316, 1317, 1308) may accommodate at least one portion of substrate(1400) and the sensor (1730).

The driving magnet (1320) may be disposed at the housing (1310). Thedriving magnet (1320) may face the driving coil (1220). The drivingmagnet (1320) may move the bobbin (1210) by interacting with the drivingcoil (1220). The driving magnet (1320) may move the bobbin (1210)through an electromagnetic interaction with the driving coil (1220). Thedriving magnet (1320) may be fixed to the second driving part couplingpart (1312) of housing (1310). The driving magnet (1320) may be adheredto the housing (1310) using an adhesive.

The driving magnet (1320) may include at least one magnet. The drivingmagnet (1320) may include first to fourth magnets (1321, 1322, 1323,1324). The driving magnet (1320) may include a first magnet (1321)disposed at the first lateral surface (1301), a second magnet (1322)disposed at the second lateral surface (1302), a third magnet (1323)disposed at the third lateral surface (1303) and a fourth magnet (1324)disposed at the fourth lateral surface (1304). The first to fourthmagnets (1321, 1322, 1323, 1324) may be mutually spaced apart. The firstto fourth magnets (1321, 1322, 1323, 1324) may be disposed at thehousing (1310) to allow two adjacent magnets to form a 90° thereamong.The first magnet (1321) may be symmetrically formed with the thirdmagnet (1323) based on a center of housing (1310). The second magnet(1322) may be symmetrically formed with the fourth magnet (1324) basedon a center of housing (1310). The center of first magnet (1321) may bedisposed closer to the fourth corner part (1308) than the first cornerpart (1305) of housing (1310). That is, the center of the first magnet(1321) may be leaned toward a fourth corner part (1308) side.

The center of second magnet (1322) may be disposed closer to the secondcorner part (1306) than the first corner part (1305) of housing (1310).That is, the center of the second magnet (1322) may be leaned toward asecond corner part (1306) side. The center of third magnet (1323) may bedisposed closer to the second corner part (1306) than the third cornerpart (1307) of housing (1310). That is, the center of the third magnet(1323) may be leaned toward a second corner part (1306) side. The centerof fourth magnet (1324) may be disposed closer to the fourth corner part(1308) than the third corner part (1307) of housing (1310). That is, thecenter of the fourth magnet (1324) may be leaned toward a fourth cornerpart (1308) side. In this case, an electromagnetic interference betweenthe first to fourth magnets (1321, 1322, 1323, 1324) and the sensingunit may be minimized. That is, an arrangement space of sensing magnet(1710) may be secured through a shape and an arrangement structure ofdriving magnet (1320) according to the present exemplary embodiment.

The substrate (1400) may be disposed at the housing (1310). Thesubstrate (400) may be disposed at an outside of a lower support member(1620). At this time, an inner surface of substrate (1400) and anoutside of lower support member (1620) may be coupled. The substrate(1400) may be mounted with a sensor (1730). At least of one portion ofsubstrate (1400) may be accommodated into a sensor substrate receptionpart (1315) formed at the housing (1310). The substrate (1400) may beelectrically connected to a distal end of one side of the driving coil(1220) by the first support unit (1620 a). The substrate (1400) may beelectrically connected to a distal end of the other side of the drivingcoil (1220) by the second support unit (1620 b). That is, the substrate(1400) may supply electricity to the driving coil (1220) through thelower support member (1620).

The substrate (1400) may include a body part (1420) accommodated intothe second reception groove (1317) of housing (1310). The substrate(1400) may include a terminal part (1430) extended downwardly from thebody part (1420). The substrate (1400) may include a sensor mountingpart (1410) bent from the body part (1420) to be accommodated into thefirst reception groove (1316) and mounted with the sensor (1730). Thesubstrate (400) may be an FPCB (Flexible Printed Circuit Board).However, the present invention is not limited thereto.

The substrate (1400) may be inserted from a lower side to the sensorsubstrate reception part (1315) of housing (1310). The substrate (1400)may be fixed by an adhesive (not shown) while being inserted into thesensor substrate reception part (1315) of housing (1310). The substrate(1400) may be such that the body part (1420) may be disposed at anoutside of housing (1310) while being inserted into the sensor substratereception part (1315) and the sensor mounting part (1410) may bedisposed at an inside of housing (1310). Through this structure, theterminal part (1430) disposed at a lower side of body part (1420) can beeasy in being coupled for electrical conduction with outside elements,and the sensor (1730) mounted on an inner surface of sensor mountingpart (1410) can monitor at a high output the sensing magnet (1710)disposed at an inside.

The sensor mounting part (1410) may be accommodated into a firstreception groove (1316) of housing (1310) by being bent from the bodypart (1420). The sensor mounting part (1410) may be mounted with asensor (1730). The body part (1420) may be accommodated into a secondreception groove (1317) of housing (1310). The body part (1420) may notbe overlapped with the driving magnet (1320) to a directionperpendicular to an optical axis. The terminal part (1430) may bedownwardly extended from the body part (1420). The terminal part (1430)may be exposed to an outside.

The substrate (1400) may include a first pad (1441) coupled with acoupling part (1624) of first support unit (1620 a). The substrate(1400) may include a second pad (1442) spaced apart from the first pad(1441) and coupled with the coupling part (1624) of second support unit(1620 b). The first and second pads (1441, 1442) may be disposed at aninside of substrate (1400). The first and second pads (1441, 1442) maybe disposed within an integral first area (1440) where conductive linesnot electrically connected with the first and second pads (1441, 1442)are not situated.

As illustrated in FIG. 27, in order for the first and second pads (1441,1442) to be disposed within the first area (1440), the first and secondpads (1441, 1442) are required to be adjacently disposed. Furthermore,the first area (1440) may be disposed at a center part of body part(1420) of substrate (1400). The first area (1440) may take a shape of asquare, for example. However, the present invention is not limitedthereto.

In order to collectively call the first and second pads (1441, 1442),terminals (1441, 1442) may be used. An area of a terminal (1441, 1442)may be such that an area of a lower surface of coupling part (1624) isgreater than an area of an upper surface of coupling part (1624) basedon a center of coupling part (1624). An area of terminal (1441, 1442)may be such that an area of lower surface is greater than an area ofupper surface based on a center of coupling part (1624). Through thisstructure, a soldering coupling between the lower surface of couplingpart (1624) and the terminals (1441, 1442) can be implemented. However,the terminals (1441, 1442) may be disposed only at a lower surface ofcoupling part (1624). At this time, the terminals (1441, 1442) may bespaced apart from the coupling part (1624).

The base (1500) may be disposed at a lower side of bobbin (1210). Thebase (1500) may be disposed at a lower surface of housing (1310). Thebase (1500) may support the stator (1300). The base (1500) may bedisposed at a lower side with a PCB. The base (1500) may function as asensor holder protecting an image sensor mounted on the PCB. The base(1500) may include a through hole (1510), a terminal reception part(1540) and a foreign object collection part (not shown). The base (1500)may include a through hole (1510) at a position corresponding to that ofa lens coupling part (1211) of bobbin (1210). Meantime, the through hole(1510) of base (1500) may be coupled with an infrared filter. Theinfrared filter may be coupled to a separate sensor holder disposed at alower surface of base (1500). The base (1500) may include a terminalreception part (1540) to accommodate at least one portion of terminalpart (1430) of substrate (1400). The terminal reception part (1540) mayaccommodate at least one portion of terminal part (1430) of substrate(1400). The terminal reception part (1540) may be formed by beinginwardly recessed from an outside of base (1500). The terminal part(1430) accommodated into the terminal reception part (1540) may be sodisposed as to expose a terminal.

The base (1500) may include a foreign object collection part to collectforeign objects introduced into the cover member (1100). The foreignobject collection part may be disposed at an upper surface of base(1500), may include an adhesive material and may collect foreign objectsinside an inner space formed by the cover member (1100) and the base(1500).

The support member (1600) may be coupled with the bobbin (1210) and thehousing (1310). At least one portion of the support member (1600) mayhave elasticity. The support member (1600) may elastically support thebobbin (1210). The support member (1600) may include an elastic member.The support member (1600) may movably support the bobbin (1210) relativeto the housing (1310). The support member (1600) may movably support themover (1200) relative to the stator (1300). The support member (1600)may movably support the bobbin (1210) relative to the base (1500).

The support member (1600) may include an upper support member (1610) anda lower support member (1620). The lower support member (1620) may bedisposed with a damper. The support member (1600) may include an uppersupport member (1610) coupled to an upper surface of bobbin (1210) andto an upper surface of housing (1310). The upper support member (1610)may be coupled to an upper surface of bobbin (1210) and to an uppersurface of housing (1310). An internal part (1612) of upper supportmember (1610) may be coupled with an upper coupling part (1213) ofbobbin (1210). An external part (1611) of upper support member (1610)may be coupled with an upper coupling part (1313) of housing (1310). Theupper support member (1610) may elastically support the bobbin (1210)relative to the housing (1310).

The upper support member (1610) may include an external part (1611), aninternal part (1612) and a connection part (1613), for example. Theupper support member (1610) may include an external part (1611) coupledwith the housing (1310), an internal part (1612) coupled with the bobbin(1210) and a connection part (1613) elastically connecting the externalpart (1611) and the internal part (1612).

The support member (1600) may include a lower support member (1620)coupled with a lower surface of bobbin (1210) and to a lower surface ofhousing (1310). The lower support member (1620) may be coupled to thebobbin (1210) and the housing (1310). The lower support member (1620)may be coupled to a lower surface of bobbin (1210) and to a lowersurface of housing (1310). An internal part (1622) of lower supportmember (1620) may be coupled with a lower coupling part (1214) of bobbin(1210). An external part (1621) of lower support member (1620) may becoupled with a lower coupling part of housing (1310). However, theexternal part (1621) of lower support member (1620) may be fixed bybeing pressed between a lower surface of housing (1310) and an uppersurface of bobbin (1210). The lower support member (1620) mayelastically support the bobbin (1210) relative to the housing (1310).

The lower support member (1620) may be divisibly disposed with a pair tosupply electricity to the driving coil (1220). The lower support member(1620) may include a pair of support units (1620 a, 1620 b) each spacedapart from the other. The lower support member (1620) may include a pairof support units (1620 a, 1620 b) in order to supply electricity to thedriving coil (1220). The lower support member (1620) may include a pairof support units (1620 a, 1620 b), each spaced apart from the other, andeach electrically connected to the driving coil (1220).

The lower support member (1620) may include an external part (1621), aninternal part (1622), a connection part (1623) and a coupling part(1624). The lower support member (1620) may include an external part(1621) coupled with a housing (1310), an internal part (1622) coupledwith a bobbin (1210), and a connection part (1623) elasticallyconnecting the external part (1621) and the internal part (1622). Thelower support member (1620) may include a coupling part (1624) coupledwith the substrate (1400). Each of the first and second support units(1620 a, 1620 b) may include an external part (1621) coupled with thehousing (1310). Each of the first and second support units (1620 a, 1620b) may include an internal part (1622) coupled with the bobbin (1210).Each of the first and second support units (1620 a, 1620 b) may includea connection part (1623) connecting the external part (1621) and theinternal part (1622). Each of the first and second support units (1620a, 1620 b) may include a coupling part (1624) extended from the externalpart (1621) to an extension direction of external part (1621).

The coupling part (1624) may be coupled with the substrate (1400). Thecoupling part (1624) may include an extension part (1625) extended fromthe external part (1621). The coupling part (1624) may include a padpart (1626) disposed at a distal end of the extension part (1625) andhaving a width wider than the extension part (1625). That is, in thepresent exemplary embodiment, the pad part (1626) of support member(1600) for being coupled with the substrate (1400) may be expanded overthe conventional pad part. Thus, workability can be improved by the padpart (1626) having a larger area and soldering between the pad part(1626) and the substrate (1400) can be made to be excellent. Thecoupling part (1624) may be extended to a position corresponding to thatof terminal (1441, 1442) of substrate (1400). The terminal (1441, 1442)of substrate (1400) and the coupling part (1624) may be electricallyconnected. The terminal (1441, 1442) of substrate (1400) and thecoupling part (1624) may be coupled by being soldered.

The coupling part (1624) may be extended along an inner surface ofsubstrate (1400). The coupling part (1624) may be more extended than adistal end of the internal part (1622). The coupling part (1624) offirst support unit (1620 a) and the coupling part (1624) of secondsupport unit (1620 b) may be extended to allow each distal end to bemutually adjacent. However, the coupling part (1624) of first supportunit (1620 a) and the coupling part (1624) of second support unit (1620b) may not be mutually touched.

A worker may perform a soldering operation to the pad part (1626) oflower support member (1620) and to the first and second pads (1441,1442) of substrate (1400) in a state of the substrate (1400) of lowersupport member (1620) being flipped over as shown in FIG. 27. At thistime, in the present exemplary embodiment, because the coupling part(1624) of first support unit (1620 a) and the coupling part (1624) ofsecond support unit (1620 b) are adjacent disposed, the soldering workby the worker can be easily performed. This effect may be easilyunderstood when compared with an imaginary comparative example where thecoupling part (1624) of first support unit (1620 a) and the couplingpart (1624) of second support unit (1620 b) are disposed at both distalends of substrate (1400). Meantime, a support part (1628) illustrated inFIG. 27 is a structure for transportation of lower support member(1620), and may be removed in the process of being assembled with thelens driving device.

As illustrated in FIG. 26, the external part (1621) and the couplingpart (1624) of lower support unit (1620 a) may be symmetrical with theexternal part (1621) of second support unit (1620 b) and the couplingpart (1624) based on a center of a first imaginary line (L1) which is animaginary straight line passing a center (C) of the lower support member(1620). The external part (1621) and the coupling part (1624) of lowersupport unit (1620 a) may be asymmetrical with the external part (1621)of second support unit (1620 b) and the coupling part (1624) based on acenter of a second imaginary line (L2) which is an imaginary straightline orthogonal at a center (C) of the lower support member (1620) withthe first imaginary straight line.

That is, only one distal end of one side between a distal end of oneside and a distal end of the other side at the first support unit (1620a) may be disposed with the coupling part (1624). Likewise, only onedistal end of one side between a distal end of one side and a distal endof the other side at the second support unit (1620 b) may be disposedwith the coupling part (1624). That is, the external part (1621) at aside not coupled with the substrate (1400) may not be disposed with thecoupling part (1624), because the coupling part (1624) is extended to becoupled with the first and second pads (1441, 1442) disposed at a centerpart of substrate (1400).

The external part (1621) of first support unit (1620 a) and the couplingpart (1624) may be symmetrical with the external part (1621) of secondsupport unit (1620 b) and the coupling part (1624) based on an imaginarysurface including an optical axis. The external part (1621) of firstsupport unit (1620 a) and the coupling part (1624) may be asymmetricalwith the external part (1621) of second support unit (1620 b) and thecoupling part (1624) based on an imaginary surface including an opticalaxis.

The lower support member (1620) may be so disposed as to correspond toan upper end of the first and second pads (1441, 1442) as illustrated inFIG. 28, as a first example. That is, an external end of pad part (1626)of lower support member (1620) may be in contact with an upper end offirst and second pads (1441,1442). In this case, the worker may performthe soldering operation at a lower side by flipping the lower supportmember (1620) and the substrate (1400), as illustrated in FIG. 27.Through this structure, in the present exemplary embodiment, a solderingarea for the pad part (1626) of lower support member (1620) and to thefirst and second pads (1441, 1442) may be maximally secured. Because ofthis structure, in the present exemplary embodiment, workability to thecoupling between the pad part (1626) of lower support member (1620) andto the first and second pads (1441, 1442) may be enhanced. Furthermore,reliability of electrical connection between the lower support member(1620) and the substrate (1400) can be secured.

The sensing unit may be provided to detect position information of lensmodule for auto focus feedback function. The sensing unit may include asensing magnet (1710) and a sensor (1730). The sensing magnet (1710) maybe disposed at one side of bobbin (1210). The compensation magnet (1720)may be disposed at the other side of bobbin (1210). The sensor (1730)may be disposed at the housing (1310) to detect the sensing magnet(1710).

The sensing magnet (1710) may be disposed at the bobbin (1210). Thesensing magnet (1710) may be detected by the sensor (1730). The sensingmagnet (1710) may be so disposed as to face the first corner part (1305)of housing (1310). The sensing magnet (1710) may be disposed on animaginary line (L of FIG. 25) which is an imaginary straight lineconnecting the first corner part (1305) and the third corner part(1307). The sensing magnet (1710) may have a magnetism corresponding tothat of the compensation magnet (1720). The sensing magnet (1710) may bedisposed at one side of bobbin (1210). The sensing magnet (1710) may beoverlapped with the driving coil (1220) to a direction perpendicular toan optical axis. The sensing magnet (1710) may be disposed at an insideof driving coil (1220). The sensing magnet (1710) may be disposed inconsideration of relative position with the sensor (1730) in order to beused only at a section where four poles are magnetized and a Hall outputis discharged in a positive number.

The compensation magnet (1720) may have a magnetism corresponding tothat of sensing magnet (1710). The compensation magnet (1720) may bedisposed at the other side of bobbin (1210) corresponding to an oppositeside of one side of bobbin (1210) disposed with the sensing magnet(1710). The compensation magnet (1720) may be disposed on an imaginarystraight line (L) connecting the first corner part (1305) and the thirdcorner part (1307). The compensation magnet (1720) may be so disposed asto be symmetrical with the sensing magnet (1710) base on a center ofbobbin (1210). Through this structure, an electromagnetic balancebetween the sensing magnet (1710) and the compensation magnet (1720) maybe realized. As a result, an influence applied to the electromagneticinteraction between the driving coil (1220) of sensing magnet (1710) andthe driving magnet (1320) can be minimized.

The sensor (1730) may be disposed at the substrate (1400). The sensor(1730) may detect the sensing magnet (1710). The sensor (1730) may bedisposed on an imaginary straight line (L) connecting the first cornerpart (1305) and the third corner part (1307). That is, the sensor(1730), the sensing magnet (1710) and the compensation magnet (1720) maybe all disposed on the imaginary line (L). The sensor (1730) may bemounted on the substrate (1400). The sensor (1730) may be mounted on asensor mounting part (1410) of substrate (1400). The sensor (1730) mayinclude a Hall sensor (Hall IC) detecting a magnetic field of a magnet.

The Hall sensor may be fixed on the housing (1310) and the sensingmagnet (1710) may be fixed on the bobbin (1210). When the sensing magnet(1710) moves together with the bobbin (1210), a magnetic flux densitydetected by the Hall IC inside the Hall sensor may be changed inresponse to the relative position of the Hall sensor and the sensingmagnet (1710). The Hall sensor may detect a position of lens moduleusing an output voltage of Hall sensor in proportion to a magnetic fluxdensity value that changes in response to a relative position of theHall sensor and the sensing magnet (1710).

The sensor (1730) may be electrically connected with the substrate(1400). A conductive line electrically connected to the sensor (1730)may not pass through a first area (1440). That is, the conductive lineof substrate (1400) connected to the sensor (1730) may avoid the firstarea (1440). In the present exemplary embodiment, the size of first area(1440) may be minimized for this characteristic. That is, the first andsecond pads (1441, 1442) may be maximally adjacent while maintaining aspaced-apart state inside the minimized first area (1440).

Hereinafter, the lens driving device according to a second exemplaryembodiment of present invention will be described with reference to FIG.29.

FIG. 29 is a bottom perspective view illustrating some elements of alens driving device according to a second exemplary embodiment ofpresent invention.

The lens driving device according to a second exemplary embodiment ofpresent invention may be different from the first exemplary embodimentin terms of position of first and second pads (1441, 1442). Thus,hereinafter, the difference of the lens driving device according to thesecond exemplary embodiment from that of the first exemplary embodimentwill be focused in explanation and any content excepted from theexplanation may be inferably applied from the explanation of firstexemplary embodiment.

In the second exemplary embodiment, the lower support member (1620) maybe disposed to correspond to a lower end of first and second pads (1441,1442). That is, an external end of the pad part (1626) of the lowersupport member (1620) may contact a lower end of the first and secondpads (1441, 1442). Through this structure, in the present exemplaryembodiment, a soldering area for the pad part (1626) of lower supportmember (1620) and the first and second pads (1441, 1442) can bemaximally secured. Because of this structure, in the present exemplaryembodiment, workability to the coupling between the pad part (1626) oflower support member (1620) and to the first and second pads (1441,1442) may be enhanced. Furthermore, reliability of electrical connectionbetween the lower support member (1620) and the substrate (1400) can besecured. Meantime, in the second exemplary embodiment, a worker mayperform the soldering operation at an upper side of the lower supportmember (1620) and the first and second pads (1441, 1442). An area ofterminals (1441, 1442) may be such that an area of an upper surface ofcoupling part (1624) is greater than an area of lower surface ofcoupling part (1624) based on the coupling part (1624). The area ofterminals (1441, 1442) may be such that an area of an upper side isgreater than an area of lower side based on the coupling part (1624). Inthis structure, a soldering operation may be performed to an uppersurface of coupling part (1624) and the terminals (1441, 1442).

Hereinafter, the lens driving device according to a third exemplaryembodiment of present invention will be described with reference to FIG.30.

FIG. 30 is a bottom perspective view illustrating some elements of alens driving device according to a third exemplary embodiment of presentinvention.

The lens driving device according to a third exemplary embodiment ofpresent invention may be different from the first exemplary embodimentin terms of position of first and second pads (1441, 1442) and/or shapeof lower support member (1620). Thus, hereinafter, the difference of thelens driving device according to the third exemplary embodiment fromthat of the first exemplary embodiment will be focused in explanationand any content excepted from the explanation may be inferably appliedfrom the explanation of first exemplary embodiment.

In the third exemplary embodiment, the lower support member (1620) maybe disposed to correspond to a center of the first and second pads(1441, 1442). In this case, a worker may perform the soldering operationat a lower end by flipping the lower support member (1620) and thesubstrate (1400) as in the first exemplary embodiment. Furthermore, theworker may also perform the soldering operation at an upper side of thelower support member (1620) and the first and second pads (1441, 1442).

An area of terminals (1441, 1442) may be such that an area of lowersurface of coupling part (1624) and an area of upper surface of couplingpart (1624) may be same based on the coupling part (1624). An area ofterminals (1441, 1442) may be such that an area of lower side ofcoupling part (1624) and an area of upper side of coupling part (1624)may be same based on the coupling part (1624). In this structure, asoldering coupling may be performed to a lower surface and/or uppersurface of coupling part (1624) and to the terminals (1441, 1442).

The lower support member (1620) may include a coupling hole (1627)coupled with at least one portion of coupling member that couples thelower support member (1620) and the first and second pads (1441, 1442).Alternatively, the lower support member (1620) may include a couplinggroove coupled with at least one portion of coupling member that couplesthe lower support member (1620) and the first and second pads (1441,1442). Here, the coupling member may be a soldering part. However, thepresent invention is not limited thereto, and any member capable ofelectrically connecting the lower support member (1620) and the firstand second pads (1441, 1442) may be used. Meantime, the coupling hole(1627) may be so formed as to pass through a portion of pad part (1626)of lower support member (1620). The coupling groove may be formed bybeing recessed to the other side from a distal end of one of the padpart (1626) of lower support member (1620). The coupling hole (1627) ofthe coupling groove may function as a passage of coupling member. Thatis, as in the third exemplary embodiment, even if the lower supportmember (1620) is disposed to correspond to a center of the first andsecond pads (1441, 1442), the coupling member may evenly flow into anupper surface and a lower surface of lower support member (1620) foradhesion by the coupling hole (1627) and/or the coupling groove of thelower support member (1620). Furthermore, the fixing force of lowersupport member (1620) of coupling member can be enhanced by the couplinghole (1627) and/or the coupling groove.

Hereinafter, the lens driving device according to a fourth exemplaryembodiment of present invention will be described with reference to FIG.31.

FIG. 31 is a bottom perspective view illustrating some elements of alens driving device according to a fourth exemplary embodiment ofpresent invention.

The lens driving device according to a fourth exemplary embodiment ofpresent invention may be different from the first exemplary embodimentin terms of position of first and second pads (1441, 1442) and/orpresence or absence of through hole (1450) of substrate (1400). Thus,hereinafter, the difference of the lens driving device according to thefourth exemplary embodiment from that of the first exemplary embodimentwill be focused in explanation and any content excepted from theexplanation may be inferably applied from the explanation of firstexemplary embodiment.

In the fourth exemplary embodiment, the first and second pads (1441,1442) may be disposed at an outer surface of substrate (1400). Thesubstrate (1400) may include a through hole (1450) adjacently formedwith the first and second pads (1441, 1442). A lower end of the firstand second pads (1441, 1442) may correspond to an upper end of thethrough hole (1450). In the fourth exemplary embodiment, the pad part(1626) of lower support member (1620) may be formed with a protrusion(1629) outwardly protruded through the through hole (1450). Through thisstructure, the protrusion (1629) and the first and second pads (1441,1442) disposed at an outside of substrate (1400) may be coupled. Thecoupling between the protrusion (1629) and the first and second pads(1441, 1442) may be implemented by soldering. In the fourth exemplaryembodiment, workability may be enhanced because a worker can perform thecoupling process between two members from an outside of the substrate(1400) and the lower support member (1620).

Hereinafter, a camera module according to an exemplary embodiment willbe described. To be more specific, an auto focus function of cameramodule will be described according to an exemplary embodiment.

When a power is supplied to the driving coil (1220), the driving coil(1220) may perform movement relative to the driving magnet (1320) inresponse to an electromagnetic interaction between the driving coil(1220) and the driving magnet (1320). At this time, the bobbin (1210)coupled with the driving coil (1220) may integrally move with thedriving coil (1220). That is, the bobbin (1210) coupled at an inner sidewith the lens module may move to an optical axis direction relative tothe housing (1310). The said movement of bobbin (1210) may result in thelens module closing in or distancing from an image sensor such that inthe present exemplary embodiment, supply of electricity to the drivingcoil (1220) may perform a focus adjustment to a subject.

Meantime, an auto focus feedback may be applied in order to implement amore accurate realization of auto focus function of the camera moduleaccording to the exemplary embodiment. The sensor (1730) disposed at thehousing (1310) may detect a magnetic field of sensing magnet (1710)fixed to the bobbin (1210). Thus, when the bobbin (1210) performs arelative movement to the housing (1310), a distance between the sensor(1730) and the sensing magnet (1710) may be changed to change an amountof magnetic field detected by the sensor (1730). The sensor (1730) maydetect a movement amount of bobbin (1210) to an optical axis directionor position of bobbin (1210) and transmit the detection value to thecontroller. The controller may determine whether to perform anadditional movement relative to the bobbin (1210) through the receiveddetection value. These types of processes are generated in real time,whereby an auto focus function of the camera module can be moreaccurately performed through the auto focus feedback according to thepresent exemplary embodiment.

As noted from the foregoing, the exemplary embodiments have explainedthe present invention using an AF model capable of performing an autofocus function. However, in a modification to the present exemplaryembodiment, the housing (1310) and the base (1500) may be spaced apartand the lateral support member may movably support the housing (1310)relative to the base (1500), an upper surface of base (1500) may bedisposed with an OIS coil part to face the driving magnet (1320). Thatis, in the modification to the present exemplary embodiment, the OISfunction and the auto focus function can be simultaneously performed.

FIGS. 32 to 49 illustrate the third exemplary embodiment of the presentinvention.

These and other aspects of various embodiments of the present inventionwill become more apparent upon consideration of the followingdescription and explanation with reference to the accompanying drawings.In the explanation of exemplary embodiments, when each layer (membrane),area, pattern or structures are described to be formed “on” or “under”the each layer (membrane), area, pattern, pad or structures, theexemplary term “on” or “under” can encompass both an element beingreferred to as being disposed or formed “directly on” and an elementbeing referred to as being indirectly disposed or formed using anintervening elements. Furthermore, reference to “on” or “under” of eachlayer is based on the given drawings. Furthermore, like referencenumerals refer to the like elements throughout.

Now, a lens driving device, a camera module including the same and anoptical device according to the exemplary embodiments will be describedwith reference to the accompanying drawings. For the convenience ofexplanation, although the lens driving device according to an exemplaryembodiment will be explained using a Cartesian coordinate system (x, y,z), other coordinate system may be used for explanation, and therefore,the present invention is not limited thereto. X axis and y axis on eachdrawing may mean a direction perpendicular to z axis which is an opticalaxis, where z axis direction, which is an optical axis direction, may becalled a “first direction” and x axis direction may be called a “seconddirection” and y axis direction may be called a “third direction”.

The “auto focus function” applied to a small camera module of a mobiledevice such as a smart phone and a tablet PC is a function of capturinga focus of an image of a subject on a surface of an image sensor. Theauto focus function may be variably configured, and the lens drivingdevice according to an exemplary embodiment can perform an auto focusfunction by moving an optical module comprised of at least one sheet oflens to a first direction.

FIG. 32 is an exploded perspective view of a lens driving device (2100)according to an exemplary embodiment of present invention, and FIG. 33is a coupled perspective view of a lens driving device (2100) except fora cover member (1100) of FIG. 32.

Referring to FIGS. 31 and 32, the lens driving device (2100) may includea cover member (2300), a bobbin (2110), a coil (2120), a magnet (2130),a housing (2140), an upper elastic member (2150), a lower elastic member(2160), a circuit substrate (2170), a first damper member (2180), asecond damper member (2190) and a base (2210).

The cover member (2300) can accommodate, in a reception space formedalong with the base (2210), a bobbin (2110), a coil (2120), a magnet(2130), a housing (2140), an upper elastic member (2150), a lowerelastic member (2160), a circuit substrate (2170) and a first dampermember (2180).

The cover member (2300) may take a shape of a box where a lower surfaceis opened and an upper end and a lateral wall are included. A lowersurface of cover member (2300) may contact an upper surface and alateral wall of base (2210). An upper end of cover member (2300) maytake a polygonal shape, a square shape or a pentagonal shape, forexample.

The cover member (2300) may be formed at an upper end with a hollow holeexposing a lens (not shown) coupled with the bobbin (2110) to an outsidelight. Furthermore, the hollow hole of the cover member (2300) may beadditionally formed with a window formed with a light transmittingmaterial in order to prevent foreign objects from entering an inside ofthe camera module. The material of cover member (2300) may benon-magnetic material such as SUS in order to prevent attachment withthe magnet (2130), but may function as a yoke by forming with a magneticmaterial.

FIG. 34 is a first coupled perspective view of between a bobbin (2110)and a coil (2120) illustrated in FIG. 32, and FIG. 35 is a secondcoupled perspective view of between a bobbin (2110) and a coil (2120)illustrated in FIG. 32.

Referring to FIGS. 34 and 35, the bobbin (2110) may be disposed at aninside of housing (2140) and may move to a first direction, e.g., a zaxis direction in response to an electromagnetic interaction between thecoil (2120) and the magnet (2130). An inner surface of bobbin (2110) maybe mounted with a lens or a lens barrel (not shown) mounted with atleast one lens. The lens barrel may be coupled to an inner surface ofbobbin (2110) using various methods.

The bobbin (2110) may be formed with a hollow hole to mount a lens or alens barrel. The hollow hole may take a shape corresponding to that of amounted lens or lens barrel, and may take a round shape, an oval shapeor a polygonal shape, for example, but the present invention is notlimited thereto. The bobbin (2110) may include at least one uppersupport protrusion (2113) disposed at an upper surface and coupled withan inner frame (2151) of upper elastic member (2150), and at least onelower support protrusion (2114) disposed at a lower surface and coupledwith an inner frame (2161) of lower elastic member (2160). The uppersupport protrusion (2113) and the lower support protrusion (2114) ofbobbin (2110) may respectively have a cylindrical shape or a prismshape, but the present invention is not limited thereto.

The bobbin (2110) may include an upper escape groove (2112) provided atone area of an upper surface corresponding to connection part (2153) ofupper elastic member (2150). Furthermore, the bobbin (2110) may includea lower escape groove (2118) provided at one area of a lower surfacecorresponding to connection part (2163) of lower elastic member (2160).When the bobbin (2110) is moved to a first direction by the upper escapegroove (2112) and the lower escape groove (2118) of bobbin (2110), aspatial interference between the connection parts (2153, 2163) of upperand lower elastic members (2150, 2160) and the bobbin (2110) can beremoved, whereby the connection parts (2153, 2163) of upper and lowerelastic members (2150, 2160) can be easily deformed. In anotherexemplary embodiments, the upper escape groove (2112) or the lowerescape groove (2118) of bobbin (2110) may be omitted.

The upper escape groove (2112) or the lower escape groove (2118) ofbobbin (2110) may be disposed near a corner of bobbin (2110), but thepresent invention is not limited thereto, and may be disposed near to alateral side of upper surface of bobbin (2110) disposed between cornersof bobbin (2110) in response to shape and/or position of the connectionparts (2153, 2163) of upper and lower elastic members (2150, 2160).

The bobbin (2110) may be provided at an outer surface with at least onecoil reception groove (not shown) disposed or formed with a coil (2120).The shape and the number of coil reception groove may correspond to theshape and number of coil disposed at an outside of bobbin (2110). Anupper surface of bobbin (2110) may be provided with a first protrusion(2110 a) corresponding to the connection part (2153) of upper elasticmember (2150). For example, the first protrusion part (2110 a) of bobbin(2110) may be protruded from a floor of the upper escape groove (2112).

For example, the first protrusion part (2110 a) may guide a bent portionof connection part (2153) of upper elastic member (2150). The firstprotrusion part (2110 a) of bobbin (2110) may have a shape same as orcorresponding to that of the bent shape of connection part (2153) ofupper elastic member (2150). For example, the first protrusion part(2110 a) of bobbin (2110) may take a polygonal shape, a round shape or asemi-circular shape, but the present invention is not limited thereto.

The first protrusion part (2110 a) of bobbin (2110) may take a lateralsurface having a same curvature as that of bent portion of connectionpart (2153) of upper elastic member (2150). For example, at least oneportion of the lateral surface of first protrusion part (2110 a) ofbobbin (2110) may take a same curvature as that of the bent portion ofconnection part (2153) of upper elastic member (2150). The number offirst protrusion part (2110 a) of bobbin (2110) may be the same as ormore than that of the connection part (2153) of upper elastic member(2150).

A lower surface of bobbin (2110) may be provided with a secondprotrusion (2110 b) corresponding to the connection part (2163) of lowerelastic member (2160). For example, the second protrusion part (2110 b)of bobbin (2110) may be protruded from a floor of the lower escapegroove (2118). For example, the second protrusion part (2110 b) ofbobbin (2110) may guide a bent portion of connection part (2163) oflower elastic member (2160). The second protrusion part (2110 b) ofbobbin (2110) may take a shape identical to or matching to the bentshape of connection part (2163) of lower elastic member (2160). Forexample, the second protrusion part (2110 b) of bobbin (2110) may apolygonal shape, a round shape or a semi-circular shape, but the presentinvention is not limited thereto.

The second protrusion part (2110 b) of bobbin (2110) may take a lateralsurface having a same curvature as that of bent portion of connectionpart (2163) of lower elastic member (2160). For example, at least oneportion of the lateral surface of second protrusion part (2110 b) ofbobbin (2110) may take a same curvature as that of the bent portion ofconnection part (2163) of lower elastic member (2160). The number ofsecond protrusion part (2110 b) of bobbin (2110) may be the same as ormore than that of the connection part (2163) of lower elastic member(2160).

Although FIGS. 34 and 35 have illustrated that the bobbin (2110) isdisposed with first and second protrusion parts, the bobbin according toanother exemplary embodiment may be disposed with any one of the firstand second protrusion parts.

Next, explanation will be provided for coil (2120).

The coil (2120) may be disposed at an outside of bobbin (2110) and mayperform an electromagnetic interaction with the magnet (2130) disposedat the housing (2140). The coil (2120) may form an electromagnetic forcethrough the electromagnetic interaction with the magnet (2130) when adriving signal, for example, a driving current is supplied, and theformed electromagnetic force may move the bobbin (2110) to a firstdirection. Furthermore, because the bobbin (2110) may be elasticallysupported by the upper and lower elastic members (2150, 2160), the autofocusing function can be implemented by the electromagnetic forcegenerated by electromagnetic interaction between the coil (2120) and themagnet (2130).

For example, the coil (2120) may be wound to wrap an outer surface ofbobbin (2110) to allow rotating to a clockwise direction or to acounterclockwise direction based on an optical axis. The coil in anotherexemplary embodiment may be embodied in a coil ring shape wound to aclockwise direction or to a counterclockwise direction based on an axisperpendicular to the optical axis, and the number of coils may be thesame as that of the magnet (2130), but the present invention is notlimited thereto.

For example, the coil may be arranged within a coil reception groove ofbobbin (2110), but the present invention is not limited thereto. Thecoil (2120) may be electrically connected to at least one of upperelastic member (2150) and lower elastic member (2160).

Next, explanation will be given to the housing.

The housing (2140) may support the magnet (2130) and accommodate thebobbin (2110) therein in order to allow the bobbin (2110) to move to afirst direction parallel with the optical axis. The housing (2140) maysupport a circuit substrate (2170).

FIG. 36 is a coupled perspective view of between a housing (2140) and acircuit substrate (2170) illustrated in FIG. 32.

Referring to FIG. 36, the housing (2140) may generally a hollow-holedpillar shape. For example, the housing (2140) may be disposed with apolygonal (e.g., square or pentagonal) or round hollow hole. The housing(2140) may include a plurality of lateral parts (2141 a to 2141 d). Thehousing (2140) illustrated in FIG. 36 includes four lateral parts, butthe present invention is not limited thereto, and may include more thanfour lateral parts.

At least one of the lateral parts (2141 a to 2141 d) of housing (2140)may be disposed with a magnet (2130). For example, at least one of thelateral parts (2141 a to 2141 d) of housing (2140) may be formed with amagnet groove (2142) accommodated, arranged or fixed by the magnet(2130). Although FIG. 36 has illustrated that the magnet groove (2142)takes a shape of a through groove, the present invention is not limitedthereto, and may take a concavely grooved shape.

The magnet (2140) according to another exemplary embodiment may bedisposed on at least one of an inner surface or an outer surface of thelateral parts (2141 a to 2141 d) of housing (2140). The housing (2140)may include at least one first stopper (2143) protruding from an uppersurface. Furthermore, the upper surface of housing (2140) may be formedwith at least one upper frame support protrusion (2144) coupled by anouter frame (2152) of the upper elastic member (2150). A lower surfaceof housing (2140) may be formed with at least one lower frame supportprotrusion (2147) coupled by an outer frame (2162) of the lower elasticmember (2160).

Corners of lateral parts (2141 a to 2141 d) of housing (2140) may beformed with a lower guide groove (2148) inserted, coupled or fastened bythe guide member (2216) of base (2210). A coupled position of housing(2140) on the base (2210) may be guided by the guide member (2216) ofbase (2210) and the lower guide groove (2148) when the housing (2140) isaccommodated or disposed on an upper surface of base (2210).Furthermore, the housing (2140) may be prevented from being disengagedfrom a to-be-mounted reference position due to vibration generatedduring the operation of lens driving device (2100) or by a worker'smistake during the coupling process.

Next, the magnet (2130) will be explained.

The magnet (2130) may be disposed on a housing (2140) in order to faceor correspond to the coil (2120). For example, the magnet (2130) may bedisposed at a magnet groove (2142) provided on the lateral parts (2141 ato 2141 d) of housing (2140) in order to overlap with the coil (2120)from an initial position of mover to a direction perpendicular to anoptical axis.

The mover may be an AF mover and the AF mover may include a bobbin(2110), and elements mounted on the bobbin (2110) and moving along withthe bobbin (2110). For example, the AF mover may include at least abobbin (2110) and a lens (not shown) mounted on the bobbin (2110), andthe mover may further include a coil (2120) according to an exemplaryembodiment.

Here, the initial position may be an initial position of mover while nopower is applied to the coil (2120), or may be a position where themover is to be laid when the upper and lower elastic members (2150,2160) are deformed only by the weight of mover. The mover, e.g., thebobbin (2110) at the initial position may be in a state of beingdistanced from a stator, e.g., the housing (2140) by the upper and lowerelastic members (2150, 2160). The lateral parts (2141 a to 2141 d) ofhousing (2140) according to another exemplary embodiment may not beformed with the magnet groove, and the magnet (2130) may be arranged onany one of an outside or an inside of the lateral parts (2141 a to 2141d) of housing (2140). The shape of magnet (2130) may be a shapecorresponding to that of the lateral parts (2141 a to 2141 d) of housing(2140), e.g., a cubic shape but the present invention is not limitedthereto.

The magnet (2130) may be formed in one body, and may be a single polemagnetized magnet or a both-pole magnetized magnet where a surfaceopposite to the coil (2120) is arranged with an S pole and an outsidesurface is arranged with a N pole. However, the present invention is notlimited thereto, and it may be possible to configure the pole directionof magnet in a reverse way.

The magnet (2130) may include two driving magnets (2131, 2132) eacharranged to face the other on the housing (2140). For example, the firstand second driving magnets (2131, 2132) may be arranged on themutually-facing first and second lateral parts (2141 a, 2141 b) amongthe lateral parts (2141 a to 2141 d) of housing (2140), but the presentinvention is not limited thereto. The driving magnet may exceed morethan two pieces, according to another exemplary embodiment. AlthoughFIG. 32 has illustrated that the magnet (2130) is disposed at thehousing (2140), the housing (2140) may be omitted in another exemplaryembodiment, and the magnet (2130) may be disposed or arranged on a covermember (2300), and the upper and lower elastic members (2150, 2160) maybe connected to the cover member (2300) or may be connected or coupledwith a frame connected or coupled with the cover member (2300).

Next, the circuit substrate (2170) will be explained.

The circuit substrate (2170) may be disposed, coupled or mounted on thehousing (2140) and may be electrically connected to at least one of theupper and lower elastic members (2150, 2160). The circuit substrate(2170) may be a PCB, e.g., an FPCB. The circuit substrate (2170) may befixed, supported or arranged on any one of the plurality of lateralparts (2141 a to 2141 d) of housing (2140). For example, the circuitsubstrate (2170) may be arranged on a lateral part (e.g., 2140 d) amongthe plurality of lateral parts (2141 a to 2141 d) of housing (2140)where the driving magnets (2131, 2132) are not disposed. The circuitsubstrate (2170) may be disposed with a plurality of terminals (2171)and may supply an electric signal to the coil (2120) by receiving theelectric signal from outside. For example, the circuit substrate (2170)may include terminals for providing a driving signal, e.g., a drivingcurrent for driving the coil (2120).

Next, the upper and lower elastic members (2150, 2160) will beexplained.

The upper and lower elastic members (2150, 2160) may be coupled with thebobbin (2110) and the housing (2140) and may elastically support thebobbin (2110). Furthermore, any one of the upper and lower elasticmembers (2150, 2160) may be electrically connected to the coil (2120)and the circuit substrate (2170).

FIG. 37 is a plain view of an upper elastic member illustrated in FIG.32, and FIG. 38 is a plane view of a lower elastic member illustrated inFIG. 32.

Referring to FIGS. 37 and 38, the upper elastic members (2150) mayinclude an inner frame (2151) coupled with an upper support protrusion(2113) of bobbin (2110), an outer frame (2152) coupled with an upperframe support protrusion (2144) of housing (2140) and a connection part(2153) connecting the inner frame (2151) and the outer frame (2152). Thelower elastic members (2160) may include an inner frame (2161) coupledwith a lower support protrusion (2114) of bobbin (2110), an outer frame(2162) coupled with a lower frame support protrusion (2147) of housing(2140) and a connection part (2163) connecting the inner frame (2161)and the outer frame (2162).

Each of the connection part (2153) of upper elastic member (2150) andthe connection part (2163) of lower elastic member (2160) may be bent atleast once to form a pattern of predetermined shape. The bobbin (2110)may be elastically (flexibly) supported at a rising and/or fallingoperation to a first direction through position change and finedeformation of the connection part (2153) of upper elastic member (2150)and the connection part (2163) of lower elastic member (2160). Eachinner frame (2151, 2161) of upper and lower elastic members (2150, 2160)may be provided with a through hole (2151 a, 2161 a) coupled with theupper and lower support protrusions (2113, 2114) of bobbin (2110). Eachouter frame (2152, 2162) of upper and lower elastic members (2150, 2160)may be provided with a through hole (2152 a, 2162 a) coupled with theupper and lower support protrusions (2144, 2147) of housing (2140).

For example, each of the upper and lower elastic members (2150, 2160)may be bonded with the bobbin (2110) using heat fusion and/or adhesive,and each of the upper and lower elastic members (2150, 2160) may bebonded with the housing (2140).

At least one of the upper and lower elastic members (2150, 2160) may bedivided to more than two pieces, and each of the elastic members dividedto more than two pieces may include the abovementioned inner frame, theouter frame and the connection frame. However, the present invention isnot limited thereto. For example, the lower elastic member (2160) mayinclude first and second lower elastic members (2160 a, 2160 b), eachmutually, electrically divided and spaced apart.

A distal end of the inner frame (2161) of the first lower elastic member(2160 a) may be provided with a first contact part (T1) electricallyconnected to a distal end of the coil (2120), and an inner frame (2161)of the second lower elastic member (2160 b) may be provided with asecond contact part (T2) electrically connected to the other end of thecoil (2120).

Furthermore, a distal end of the outer frame (2162) of the first lowerelastic member (2160 a) may be provided with a third contact part (T3)electrically connected to a first terminal of the circuit substrate(2170), and a distal end of outer frame (2162) of the second lowerelastic member (2160 b) may be provided with a fourth contact part (T4)electrically connected to a second terminal of the circuit substrate(2170).

Bonding between both ends of coil (2120) and the first and secondcontact parts (T1, T2) of first and second lower elastic members (2160a, 2160 b), and bonding between the circuit substrate (2170) and thethird and fourth contact parts (T3, T4) may be realized using heatfusion and/or adhesive.

Next, the base (2210) will be explained.

The base (2210) may form a reception space between the bobbin (2110) andthe housing (2140) by coupling with the cover member (2300). The base(2210) may be formed with a hollow hole corresponding to a hollow holeof bobbin (2110) or/and a hollow hole of housing (2140), and the hollowhole of base (2210) may have a shape corresponding to that of covermember (2300), e.g., that of a square hollow hole. The base (2210) maybe formed with a staircase (2211, see FIG. 32) to be coated with anadhesive when adhesively fixing the cover member (2300). At this time,the staircase (2211) may guide the cover member (2300) coupled at anupper side, and may be so coupled as to allow a distal end of covermember (2300) to be surface-contacted.

The base (2210) may include a guide member (2216) protruded from fourcorner parts to an upper surface direction, where the guide member(2216) may take a polygonal prism shape. However, the present inventionis not limited thereto. The guide member (2216) may be inserted,fastened or coupled to a lower guide groove (2148) of the housing(2140).

Next, a first damper member (2180) and a second damper member (2190)will be explained.

The first damper member (2180) may be interposed between the bobbin(2110) and the connection part (2153) of upper elastic member (2150).The first damper member (2180) may be realized by a sol or gel-shapedresin material, e.g., epoxy. For example, the first damper member (2180)may be disposed between an upper surface of bobbin (2110), e.g., a floorof upper escape groove (2112), and a connection part (2153) of upperelastic member (2150).

Furthermore, the first damper member (2180) may be arranged between alateral surface of first protrusion part (2111 a) of bobbin (2110) and aconnection part (2153) of upper elastic member (2150). The firstprotrusion part (2111 a) may function to prevent the material of firstdamper member (2180), sol or gel-shaped resin from flowing down.

FIG. 39 is a schematic view illustrating a first damper member (2180)interposed between a connection part (2153) of upper elastic member(2150) and a bobbin (2110), and FIG. 40a is a schematic cross-sectionalview of a bent part (2153-3), a first damper member (2180) and a firstprotrusion part (2111 a) illustrated in FIG. 39 to an AB directionaccording to an exemplary embodiment of present invention.

Referring to FIGS. 39 and 40 a, the connection part (2153) of upperelastic member (2150) may include mutually connected plurality of bentparts (2153-1 to 2153-5). For example, the connection part (2153) ofupper elastic member (2150) may include first bent parts (2153-1,2153-3, 2153-5) convexly formed from a bobbin (2110) direction to ahousing (2140) direction, and second bent parts (2153-2, 2153-4)convexly formed from a housing (2140) direction to a bobbin (2110)direction, where the second bent parts (2153-2, 2153-4) may be disposedamong the first bent parts (2153-1, 2153-3, 2153-5).

Any one (e.g., 2153-3) of the plurality of bent parts (2153-1 to 2153-5)in the connection part (2153) at the upper elastic member (2150) may beso disposed as to encompass a lateral surface of first protrusion part(2111 a) of bobbin (2110).

For example, an inner surface of bent part (e.g., 2153-3) encompassingthe first protrusion part (2111 a) of bobbin (2110) may have a sameshape, e.g., a same curvature as that of lateral surface of the firstprotrusion part (2111 a).

For example, although the bent part (e.g., 2153-3) disposed at a centerin the plurality of bent parts (2153-1 to 2153-5) in the connection part(2153) at the upper elastic member (2150) is so disposed as to encompassa lateral surface of first protrusion part (2111 a) of bobbin (2110),the present invention is not limited thereto.

For example, when the number of plurality of bent parts (2153-1 to2153-5) convexly formed from a bobbin (2110) direction to a housing(2140) direction is an odd number, the bent part (e.g., 2153-3) disposedat a center in the plurality of bent parts (2153-1 to 2153-5) may be sodisposed as to encompass a lateral surface of first protrusion part(2111 a) of bobbin (2110).

The first damper member (2180) may be disposed between a lateral surfaceof first protrusion part (2111 a) of bobbin (2110) and a correspondingbent part (e.g., 2153-3) in the connection part (2153) at the upperelastic member (2150).

The first damper member (2180) may be disposed between a lateral surfaceof first protrusion part (2111 a) of bobbin (2110) and any one of firstbent parts (2153-1, 2153-3, 2153-5). For example, the first dampermember (2180) may be disposed between a lateral surface of firstprotrusion part (2111 a) of bobbin (2110) and the first bent part (e.g.,2153-3) disposed at a center in the plurality of first bent parts(2153-1, 2153-3, 2153-5).

The first damper member (2180) may contact a lateral surface of firstprotrusion part (2111 a) of bobbin (2110), a bent part (e.g., 2153-3) inthe connection part (2153) at the upper elastic member (2150)corresponding to the first protrusion part (2111 a) and an upper surfaceof bobbin (2110), e.g., a floor of upper escape groove (2112).

FIG. 40b is a schematic cross-sectional view of a bent part (2153-3), afirst damper member (2180 a) and a first protrusion part (2111 a)illustrated in FIG. 39 to an AB direction according to another exemplaryembodiment of present invention.

Referring to FIG. 40b , the first damper member (2180 a), in addition tothe damper member (2180) of FIG. 40a , may be also disposed between abent part (e.g., 2153-3) in the connection part (2153) at the upperelastic member (2150), and an upper surface of bobbin (2110), e.g., afloor of upper escape groove (2112).

FIG. 40c is a schematic cross-sectional view of a bent part (2153-3), afirst damper member (2180 b) and a first protrusion part (2111 a)illustrated in FIG. 39 to an AB direction according to still anotherexemplary embodiment of present invention.

Referring to FIG. 40c , the first damper member (2180 b), in addition tothe damper member (2180 a) of FIG. 40b , may be also disposed between anupper surface of bent part (e.g., 2153-3) in the connection part (2153)at the upper elastic member (2150), and an upper surface of firstprotrusion part (2111 a) of bobbin (2110).

FIG. 41 is a schematic view of bent parts (2153-1 to 2153-6) and firstdamper member (2180-1) according to another exemplary embodiment ofpresent invention.

Referring to FIG. 41, the connection part of the upper elastic member(2150) may include first bent parts (2153-1, 2153-3, 2153-5), and secondbent parts (2153-2, 2153-4, 2153-6).

The first damper member (2180-1) may be disposed between a lateralsurface of first protrusion part (2111 a) of bobbin (2110) and any oneof second bent parts (2153-2, 2153-4, 2153-6).

For example, the first damper member (2180-1) may be disposed between alateral surface of first protrusion part (2111 a) of bobbin (2110) and asecond bent part (e.g., 2153-4) disposed at a center in the plurality ofsecond bent parts (2153-2, 2153-4, 2153-6).

For example, when the number of plurality of first bent parts (2153-2,2153-4, 2153-6) convexly formed from a house (2140) direction to abobbin (2110) direction is an odd number, the bent part (e.g., 2153-4)disposed at a center in the plurality of bent parts (2153-2, 2153-4,2153-6) may be so disposed as to encompass a lateral surface of firstprotrusion part (2111 a) of bobbin (2110).

The first damper member (2180-1) may be disposed between a lateralsurface of first protrusion part (2111 a) of bobbin (2110) and acorresponding bent part (e.g., 2153-4) in the connection part (2153) atthe upper elastic member (2150).

The explanation of FIGS. 40a to 40c may be identically applied to thatof FIG. 41. FIG. 42 is a schematic view of second damper memberaccording to an exemplary embodiment of present invention.

Referring to FIG. 42, a second damper member (2190) may be disposedbetween a bobbin (2110) and a connection part (2163) at the lowerelastic member (2160). The second damper member (2190) may be realizedby a sol or gel-shaped resin material, e.g., epoxy. For example, thesecond damper member (2190) may be arranged between a lower surface ofbobbin (2110), e.g., a floor of a lower escape groove (2118) and aconnection part (2163) of lower elastic member (2160).

Furthermore, the second damper member (2190) may be disposed between alateral surface of second protrusion part (2111 b) of bobbin (2110) anda connection part (2163) of lower elastic member (2160). The secondprotrusion part (2111 b) may function to prevent the material of seconddamper member (2190), sol or gel-shaped resin, from flowing down.

The connection part (2163) of lower elastic member (2160) may include amutually-connected plurality of bent parts (2163-1 to 2163-5).

The connection part (2163) of lower elastic member (2160) may includefirst bent parts (2163-1, 2163-3, 2163-5) convexly formed from a bobbin(2110) direction to a housing (2140) direction, and second bent parts(2163-2, 2163-4) convexly formed from a housing (2140) direction to abobbin (2110) direction, where the second bent parts (2163-2, 2163-4)may be disposed among adjacent first bent parts (2163-1, 2163-3,2163-5).

Any one (e.g., 2163-3) of the plurality of bent parts (2163-1 to 2163-5)in the connection part (2163) at the lower elastic member (2160) may beso disposed as to encompass a lateral surface of second protrusion part(2111 b) of bobbin (2110).

For example, an inner surface of bent part (e.g., 2163-3) encompassingthe second protrusion part (2111 b) of bobbin (2110) may have a sameshape, e.g., a same curvature as that of lateral surface of the secondprotrusion part (2111 b).

For example, although the bent part (e.g., 2163-3) disposed at a centerin the plurality of bent parts (2163-1 to 2163-5) in the connection part(2163) at the lower elastic member (2160) is so disposed as to encompassa lateral surface of second protrusion part (2111 b) of bobbin (2110),the present invention is not limited thereto.

The second damper member (2190) may be disposed between a lateralsurface of second protrusion part (2111 b) of bobbin (2110) and acorresponding bent part (e.g., 2163-3) in the connection part (2163) atthe lower elastic member (2160).

The second damper member (2190) may be disposed between a lateralsurface of second protrusion part (2111 b) of bobbin (2110) and any oneof second bent parts (2163-1, 2163-3, 2163-5). For example, the seconddamper member (2190) may be disposed between a lateral surface of secondprotrusion part (2111 b) of bobbin (2110) and the second bent part(e.g., 2163-3) disposed at a center in the plurality of second bentparts (2163-1, 2163-3, 2163-5).

The second damper member (2190) may contact a lateral surface of secondprotrusion part (2111 b) of bobbin (2110), a bent part (e.g., 2163-3) inthe connection part (2163) at the lower elastic member (2160)corresponding to the second protrusion part (2111 b) and an uppersurface of bobbin (2110), e.g., a floor of lower escape groove (2118).

The first and second damper members (2180, 2190) may function tomitigate the translation of the connection part (2153) at the upperelastic member (2160) and the connection part (2163) at the lowerelastic member (2160) that are elastically deformed at the same timewhen the bobbin (2110) moves, and to restrict the vibration of bobbin(2110).

The first damper members (2180, 2180-1) explained in FIGS. 40a to 40cand FIG. 41 may be identically applied to that of FIG. 42 according toanother exemplary embodiment.

FIG. 43a is a first perspective view of a bobbin according to anotherexemplary embodiment of present invention, FIG. 43b is a secondperspective view of a bobbin according to another exemplary embodimentof present invention, and FIG. 44 is a schematic view of first dampermembers according to another exemplary embodiment of present invention.

Referring to FIGS. 43a, 43b and 44, the another exemplary embodiment ofpresent invention may include a bobbin having two or more firstprotrusion parts (2111 a 1, 2111 a 2), each mutually spaced apart fromthe other, formed on an upper surface, e.g., a floor of upper escapegroove (2112).

The connection part (2153) of upper elastic member (2150) may include aplurality of bent parts (2153-1 to 2153-7).

The another exemplary embodiment of present invention may include, asillustrated in FIG. 44, two or more first damper members (2180-1,2180-2). Each of the first damper members (2180-1, 2180-2) may bedisposed between any one of corresponding plurality of bent parts(2153-1 to 2153-7) and any one of corresponding first protrusion parts(2111 a 1, 2111 a 2).

For example, when the number of plurality of first bent parts (2153-1,2153-3, 2153-5, 2153-7) convexly formed from a bobbin (2110) directionto a housing (2140) direction is an even number, the even numbered(e.g., 2) bent parts (e.g., 153-3, 2153-5) disposed at a center in theplurality of bent parts (2153-1, 2153-3, 2153-5, 2153-7) may be sodisposed as to encompass a lateral surface of first protrusion part(2111 a 1, 2111 a 2) of bobbin (2110).

The first damper members (2180-1, 2180-2) may be disposed betweencentrally-disposed bent parts (2153-3, 2153-7) and corresponding firstprotrusion parts (2111 a 1, 2111 a 2) of bobbin (2110).

In another exemplary embodiment, when the number of first bent partsconvexly formed from a housing (2140) direction to a bobbin (2110)direction is an even number, each even numbered (e.g., 2) bent partsdisposed at a center in the plurality of bent parts may be so disposedas to encompass any one corresponding lateral surface of firstprotrusion parts of bobbin (2110). Furthermore, the first damper membersmay be disposed between first protrusion parts corresponding to the twocentrally-disposed bent parts.

The exemplary embodiment of FIG. 44 may be different from that of FIG.39 only in terms of the number of first protrusion parts, the number ofbent parts in the connection part of upper elastic member (2150), andthe number of first damper members, and the content explained in FIGS.39 to 41 may be identically applied.

A bobbin (2110-1) according to another exemplary embodiment may includetwo or more mutually discrete second protrusion parts (2111 b 1, 2111 b2) formed on a lower surface, e.g., a lower escape groove (2118).

Albeit not being illustrated, the bobbin according to another exemplaryembodiment may include two or more second damper members (not shown),and each of the second damper members may be disposed between anycorresponding one of the plurality of bent parts of the connection part(2163) of lower elastic member (2160) and any corresponding one of thesecond protrusion parts (2111 b 1, 2111 b 2).

The second damper member (2190) explained in FIG. 42 may be identicallyapplied to the second damper member of another exemplary embodimentalbeit being different from that of FIG. 42 only in terms of the numberof second protrusion parts, the number of bent parts in the connectionpart of lower elastic member (2160), and the number of second dampermembers.

Although the exemplary embodiment of FIG. 32 may include both the firstand second damper members (2180, 2190), the present invention is notlimited thereto, and other exemplary embodiments may include any one ofthe first and second damper members (2180, 2190).

The low-priced lens driving device may include two magnets (2130) asillustrated in FIG. 32. When compared with a case where the number ofmagnets are four, the electromagnetic force in response to interactionwith the first coil (2120) may be less in case of where the number ofmagnets are two, such that it is necessary to lowly change the springconstant (K) of upper and lower elastic members for AF driving, where,when the spring constant (K) of upper and lower elastic members is low,the trembling of mover, e.g., the bobbin (2110) by an outside shock maybe great, which results in degradation of resolution of camera moduleand therefore, the setting time can be elongated to disable a stablecamera operation.

The first and second damper members (2180, 2190) may restrict thetrembling of mover, e.g., the bobbin (2110) of lens driving devicecaused by vibration of vibration motor of a mobile phone.

Particularly, because the first and second damper members (2180, 2190)are disposed between the centrally-disposed bent parts (e.g., 2153-3,2163-3) of connection parts (2153, 2163) of upper and lower elasticmembers (2150, 2160) and a lateral surface of first and secondprotrusion parts (2111 a, 2111 b) of bobbin (2110), the degree oftrembling of mover caused by vibration of vibration motor on a mobilephone can be mitigated.

When the spring constant (K) of upper and lower elastic members (2150,2160) is low, the trembling restriction force to the mover by the firstand second damper members (2180, 2190) may be further enhanced.Furthermore, the first and second damper members (2180, 2190) canrestrict the trembling of mover at the lens driving device caused byoutside shock such as touch input of a smart phone.

FIG. 45a is a schematic view of a first frequency responsecharacteristics on peak of ratio of displacement at bobbin (2110) and adriving signal applied to a coil (2120) when a damper member (2180,2190) is disposed according to an exemplary embodiment of presentinvention, and FIG. 45b is a schematic view of a second frequencyresponse characteristics on peak of ratio of displacement at bobbin(2110) and a driving signal applied to a coil (2120) when a dampermember (2180, 2190) is not disposed according to an exemplary embodimentof present invention.

FIG. 45b illustrates a structure where the damper member (2180, 2190)alone is exempted from the exemplary embodiment of FIG. 45a , and FIGS.45a, and 45b illustrate an experimental result under the same conditionexcept for presence and absence of damper member (2180, 2190).

FIGS. 45a and 45b show a frequency response characteristic on a ratiobetween input and output, where the input may be a driving signal, e.g.,a driving current, or a driving voltage inputted to the coil (2120), andthe output may be a displacement of mover, e.g., the bobbin (2110) inresponse to frequency change of a driving signal inputted to the coil(2120).

FIGS. 45a and 45b show a result, where a current or a voltage applied tothe coil (2120) is changed, and the change of displacement of mover inresponse to the changed current or frequency change of voltage isoutputted, in order to directly ascertain the influence of tremblingapplied to a mover by an outside shock or a vibration of vibrationmotor.

For example, FIGS. 45a and 45b illustrate a displacement value of amover in response to a result where the frequency of inputted voltage ischanged within a scope of 2 [Hz]˜200 [Hz] while an amplitude of voltageinputted to the coil (2120) is fixed at 100 Mv. For example, adisplacement value of mover may be measured using a displacement sensor,and the mover displacement may be set at 1 [mm] in response to an outputvalue 1[V] of displacement sensor, but the present invention is notlimited thereto, and the displacement of mover versus the output valueof displacement sensor may be set at 1:K (where K is a positive integerof K>10).

g1 and g2 are frequency response characteristic graphs on peaks, and P1and P2 are frequency response characteristic graphs on phases.

The first (primary) resonance frequency (f1′) of first frequencyresponse characteristic may be higher by 3 [Hz]˜15 [Hz] than the firstresonance frequency (f1) of second frequency response characteristic.

For example, the first resonance frequency (f1′) of first frequencyresponse characteristic may be higher by 5 [Hz]˜10 [Hz] than the firstresonance frequency (f1) of second frequency response characteristic.

Furthermore, for example, the first resonance frequency (f1′) of firstfrequency response characteristic may be higher by 8 [Hz]˜10 [Hz] thanthe first resonance frequency (f1) of second frequency responsecharacteristic.

Furthermore, for example, as illustrated in FIGS. 45a and 45b , thefirst resonance frequency (f1′) of first frequency responsecharacteristic may be higher by about 6 [Hz] than the first resonancefrequency (f1) of second frequency response characteristic.

For example, the first resonance frequency (f1′) of first frequencyresponse characteristic may be 50 [Hz]˜170 [Hz]. For example, the firstresonance frequency (F1′) of first frequency response characteristic maybe 70 [Hz].

The first resonance frequency (f1′) of first frequency responsecharacteristic may not be overlapped with a resonance frequency (e.g.,175 [Hz] 180 [Hz]) of vibration motor. For example, a difference betweenthe first resonance frequency (f1′) of first frequency responsecharacteristic and the resonance frequency of vibration motor may bemore than 5 [Hz]. In another exemplary embodiment, a difference betweenthe first resonance frequency (f1′) of first frequency responsecharacteristic and the resonance frequency of vibration motor may bemore than 10 [Hz].

The peak (peak 1) at the first resonance frequency (f1′) of firstfrequency response characteristic may be lower by 5 [dB]˜20 [dB] thanthe peak (peak 2, hereinafter referred to as “reference peak”) at thefirst resonance frequency (f1) of second frequency responsecharacteristic.

For example, the peak (peak 1) at the first resonance frequency (f1′) offirst frequency response characteristic may be lower by 10 [dB]˜20 [dB]than the peak (peak 2, hereinafter referred to as “reference peak”) atthe first resonance frequency (f1) of second frequency responsecharacteristic.

Furthermore, for example, the peak (peak 1) at the first resonancefrequency (f1′) of first frequency response characteristic may be lowerby 15 [dB]˜20 [dB] than the peak (peak 2) at the first resonancefrequency (f1) of second frequency response characteristic. For example,the peak 1 may be lower by 15 [dB] than the peak 2.

The first peak lower than a first reference frequency (f2′) of firstfrequency response characteristic may be lower by 3 [dB]˜8 [dB] than thesecond peak at the second reference frequency (f2) of second frequencyresponse characteristic.

For example, the first peak lower than a first reference frequency (f2′)of first frequency response characteristic may be lower by 3 [dB]˜6 [dB]than the second peak at the second reference frequency (f2) of secondfrequency response characteristic.

For example, when an absolute value of difference between the first peaklower than a first reference frequency (f2′) and the second peak lowerthan the second reference frequency (f2) is less than 3 [dB], the depthof field for lens mounted on the lens driving device (2100) may beinfluenced by the vibration of linear vibration motor or outside shock,and therefore, the resolution may be degraded or the focus may betwisted.

On the other hand, when an absolute value of difference between thefirst peak lower than a first reference frequency (f2′) and the secondpeak lower than the second reference frequency (f2) exceed 8 [dB], theAF driving force may be weakened to require an increase in input drivingsignal for driving, whereby the power consumption may be increased andthe AF sensitivity may be dulled.

Furthermore, for example, the first peak lower than a first referencefrequency (f2′) of first frequency response characteristic may be lowerby 6 [dB]˜8 [dB] than the second peak at the second reference frequency(f2) of second frequency response characteristic, in order to preventthe depth of field for lens mounted on the lens driving device (2100)from being more stably influenced by the vibration of linear vibrationmotor or outside shock.

Here, the first reference frequency (f2′) may be a low frequency as muchas a difference of first frequency pre-set at the first resonancefrequency (f1′) of first frequency response characteristic. For example,the difference of pre-set first frequency may be 40 [Hz]˜70 [Hz].Furthermore, in still another exemplary embodiment, the difference ofpre-set first frequency may be 50 [Hz]˜60 [Hz].

The second reference frequency (f2) may be a low frequency as much as adifference of second frequency pre-set at the first resonance frequency(f1) of second frequency response characteristic. For example, thedifference of pre-set second frequency may be 40 [Hz]˜70 [Hz].Furthermore, in still another exemplary embodiment, the difference ofpre-set second frequency may be 50 [Hz]˜60 [Hz]. The difference ofpre-set first frequency and the difference of pre-set second frequencymay be identical.

The second peak lower less than the second reference frequency (f2) maybe about −3 [dB] at FIG. 45b , and the first peak less than the firstreference frequency (f2′) at FIG. 45a may be about −7 [dB], and adifference therebetween (first peak-second peak) may be about −4 [dB].

By lowering the first peak less than the first reference frequency (f2′)than the second peak less than the second reference frequency (f2) by 3[dB]˜6 [dB], the depth of field for a lens mounted on the lens drivingdevice (2100) can be prevented from being influenced by the vibration ofa linear vibration motor having a first resonance frequency of 175[Hz]˜180 [Hz] according to the exemplary embodiment. For example, thedepth of field for lens may be 5 μm 10 μm. For example, the depth offield for lens may be 10 μm.

FIG. 46a is a displacement of a mover according to a time in case ofFIG. 45b , and FIG. 46b is a displacement of a mover according to a timein case of FIG. 45 a.

Referring to FIGS. FIG. 46a and FIG. 46b , a time (250 [ms]) taken fordisplacement of a mover of FIG. 46b formed with first and second dampermembers (2180, 2190) to enter a normal state may be shorter than a time(200 [ms]) taken for displacement of a mover of FIG. 46a to enter anormal state.

The first resonance frequency (f1′) of first frequency responsecharacteristic may be more increased by as much as 5 [Hz]˜10 [Hz] thanthe first resonance frequency (f1) of second frequency responsecharacteristic by the first damper member (2180) disposed between thebent part (2153-3) of connection part (2153) of upper elastic member(2150) and the first protrusion part (2111 a) of bobbin (2110), and thesecond damper member (2190) disposed between the bent part (2163-3) ofconnection part (2163) of lower elastic member (2160) and the secondprotrusion part (2111 b) of bobbin (2110), and the first peak of firstfrequency response characteristic may be lowered by as much as 3 [dB]˜6[dB] than the second peak of second frequency response characteristic,and the (peak 1) of first resonance frequency (f1′) of first frequencyresponse characteristic may be lowered by as much as 10 [dB]˜20 [dB]than the peak (peak 2) of the first resonance frequency of secondfrequency response characteristic.

As a result, the depth of field for lens mounted on the lens drivingdevice (2100) may be prevented from being influenced by the vibration oflinear vibration motor or outside shock, whereby degradation ofresolution can be prevented and therefore, a mounting time of lensdriving device caused by shock can be reduced.

FIG. 47 is an exploded perspective view of a camera module (200)according to an exemplary embodiment of present invention.

Referring to FIG. 47, the camera module (200) may include a lens barrel(2400), a lens driving device (2100), an adhesive member (2710), afilter (2610), a first holder (2600), a second holder (2800), an imagesensor (2810), a motion sensor (2820), a controller (2830) and aconnector (2840).

The lens barrel (2400) may be mounted on a bobbin (2110) of lens drivingdevice (2100). The first holder (2600) may be disposed beneath the base(2210) of lens driving device (2100). The filter (2610) may be mountedon the first holder (2600), and the first holder (2600) may include aprotrusion part (2500) accommodated by the filter (2610).

The adhesive member (2710) may adhere or couple the base (2210) of lensdriving device (2100) to the first holder (2600). The adhesive member(2710) may also function to prevent the foreign object from coming intothe lens driving device (2100) in addition to the abovementionedadhering function. For example, the adhesive member (2710) may be epoxy,heat-hardening adhesive, a UV hardening adhesive.

The filter (2610) may function to prevent a light of particularfrequency band in the light passing through the lens barrel (2400) frombeing incident on the image sensor (2810). The filter (2610) may be aninfrared cut-off filter, but the present invention is not limitedthereto. At this time, the filter (2610) may be disposed to be inparallel with the x-y plane.

An area of the first holder (2600) mounted with the filter (2610) may beformed with a hollow hole to allow a light having passed the filter(2610) to be incident on the image sensor (2810). The second holder(2800) may be disposed at a lower surface of first holder (2600) and thesecond holder (2600) may be mounted with an image sensor (2810). Theimage sensor (2810) may be an area where a light having passed thefilter (2610) is incident, and an image included by the light iscaptured.

The second holder (2800) may be formed with various circuits, elementsand controller for transmitting an image to an outside device byconverting the image captured on the image sensor (2810) to an electricsignal. The second holder (2800) may be mounted with an image sensor,and formed with a circuit pattern, and may be realized as a circuitsubstrate coupled by various elements.

The image sensor (2810) may receive an image included in a lightincident through the lens driving device (2100) and convert the receivedimage to an electric signal. The filter (2610) and the image sensor(2810) may be so disposed as to face each other to a first direction.

The motion sensor (2820) may be mounted on the second holder (2800) andmay be electrically connected to the controller (2830) through a circuitpattern provided on the second holder (2800). The motion sensor (2820)may output rotational angular speed information in response to themovement of camera module (2200). The motion sensor (2820) may berealized by a 2-axis gyro sensor or a 3-axis gyro sensor, or an angularspeed sensor.

The controller (2830) may be mounted on the second holder (2800), andmay be electrically connected with a second position sensor (2240) oflens driving device (2100) and with a second coil (2230). For example,the second holder (2800) may be electrically connected to the circuitsubstrate (2250) of lens driving device (2100), and the controller(2820) mounted on the second holder (2800) may be electrically connectedto the second position sensor (2240) and the second coil (2230) throughthe circuit substrate (2250).

The controller (2830) may output a driving signal capable of performingan OIS to the OIS mover of lens driving device (2100), based on feedbacksignals provided from the second position sensor (2240) of lens drivingdevice (2100).

The connector (2840) may be electrically connected to the second holder(2800) and may be disposed with a port for being electrically connectedto an outside device.

Furthermore, the lens driving device (2100) according to an exemplaryembodiment may be included in an optical instrument in which a phase ofan image in a space can be formed using reflection, refraction,absorption, interference and diffraction which are the physicalproperties of light, an increase in visual ability of eyes is targeted,record of phase by a lens and reproduction thereof are targeted, opticalmeasurement, transmission or propagation of phase is targeted. Forexample, an optical instrument according to the exemplary embodiment mayinclude a portable terminal mounted with a smart phone or a camera.

FIG. 48 is a perspective view of a portable terminal (2200A) accordingto an exemplary embodiment of present invention, and FIG. 49 is a blockdiagram of a portable terminal illustrated in FIG. 48.

Referring to FIGS. 48 and 49, the portable phone (2200A, hereinafterreferred to as “terminal”) may include a body (2850), a wirelesscommunication part (2710), an A/V input part (2720), a sensing part(2740), an input/output part (2750), a memory part (2760), an interfacepart (2770), a controller (2780) and a power supplier (2790).

Although the body (2850) illustrate in FIG. 48 has a bar shape, thepresent invention is not limited thereto, and may include variousstructures including a slide type where two or more sub-bodies arecoupled in a relative movement, a folder type, a swing type and a swiveltype.

The body (2850) may include a case (casing, housing, cover and the like)forming an external look. For example, the body (2850) may be divided toa front case (2851) and a rear case (2852). Various electronic parts ofterminal may be embedded in a space formed between the front case (2851)and the rear case (2852).

The wireless communication part (2710) may include one or more ofmodules enabling a wireless communication between the terminal (2200A)and a wireless communication system or between the terminal (2200A) anda network disposed with the terminal (2200A). For example, the wirelesscommunication part (2710) may be configured by including a wirelesscommunication part (2710), a broadcasting reception module (2711), amobile communication module (2712), a wireless internet module (2713), anear-field communication module (2714) and a position information module(2715).

The A/V input part (2720) is formed for input of audio signal or inputof video signal, and may include a camera (2721) and a microphone(2722). The camera (2721) may include a camera module (200) of FIG. 47according to an exemplary embodiment.

The sensing part (2740) may generate a sensing signal for operation ofterminal (2200A) by detecting a current state of terminal (2200A)including an open/close state of terminal (2200A), position of terminal(2200A), presence and/or absence of user touch, azimuth of terminal(2200A) and acceleration/deceleration of terminal (2200A). For example,when the terminal (2200A) is a slide phone type, the sensing part (2740)may sense the open/close state of slide phone. Furthermore, the sensingpart (2740) may take charge of sensing functions related to power supplyof power supplier (2790) and coupling of outside devices of interfacepart (2770).

The input/output part (2750) is formed to generate an input or an outputrelated to visual, audio or tactile matters. The input/output part(2750) may generate an input data for operation control of the terminal(2200A), and may display information processed by the terminal (2200A).

The input/output part (2750) may include a key pad part (2730), adisplay module (2751), a sound output module (2752) and a touch screenpanel (2753). The key pad part (2730) may generate an input data inresponse to a key pad input.

The display module (2751) may include a plurality of pixels that changein color in response to an electric signal. For example, the displaymodule (2751) may include at least one of a liquid crystal display, athin film transistor-liquid crystal display, an organic light-emittingdiode, a flexible display and a 3D display.

The sound output module (2752) may output an audio data received fromthe wireless communication part (2710) under a call signal reception,communication mode, recording mode, audio recognition mode or abroadcasting reception mode, or output an audio data stored in thememory part (2760).

The touch screen panel (2753) may convert the changes in capacitancegenerated by a user touch to a particular area on a touch screen to anelectric input signal.

The memory part (2760) may store programs for processing and control ofcontroller (2780), and temporarily store inputted/outputted data (e.g.,telephone directory, message, audio, stationary image, photograph andvideo). For example, the memory part (2760) may store imagesphotographed by the camera (2721), e.g., photograph or video.

The interface part (2770) may function as a passage connected to outsidedevices connected to the terminal (2200A). The interface part (2770) mayreceive data from outside devices, transmit a power to each elementinside the terminal (2200A) by receiving the power, or allow data insidethe terminal (2200A) to be transmitted to outside devices. For example,the interface part (2770) may include a wired/wireless headset port, anoutside charging port, a wired/wireless data port, a memory card port, aport connecting a device formed with a recognition module, an audioinput/output port, a video input/output port and earphone port.

The controller (2780) may control an overall operation of terminal(2200A). For example, the controller (2780) may perform a control andprocessing operation related to audio communication, data communicationand video communication.

The controller (2780) may be formed with a multimedia module (2781) formultimedia reproduction. The multimedia module (2781) may be realizedwithin the controller (2780) and may be realized separately from thecontroller (2780).

The controller (2780) may implement a pattern recognition processconfigured to recognize a writing input performed on a touch screen or apicture drawing input as a character or an image.

The power supplier (2790) may supply a power necessary for operation ofeach element by receiving an outside power or an inside power inresponse to control of the controller (2780).

The characteristics, structures and effects explained in theabovementioned exemplary embodiments may be included in at least oneexemplary embodiment of the present invention, and cannot be limited toone exemplary embodiment. Furthermore, the characteristics, structuresand effects exemplified in the abovementioned exemplary embodiments maybe implemented by being combined or changed to the other exemplaryembodiments by the skilled in the art.

Moreover, it should be interpreted that contents related to thecombinations and changes may be included in the protection scope ofpresent invention.

The fourth exemplary embodiment of present invention may include any oneor more configurations in the foregoing first, second and thirdexemplary embodiments.

The first exemplary embodiment may include a conductive line formingstructure {combined structure of lower support member (16200) and asubstrate (1400)} of driving coil (1220) improved in workability in thesecond exemplary embodiment. The first exemplary embodiment may includea resonance prevention structure of third exemplary embodiment {dampermember (2180) coating structure to bobbin (2110) and upper elasticmember (2150)}.

The second exemplary embodiment may include an assembly accuracyimprovement structure of sensor (720) and sensing magnet (710) in thefirst exemplary embodiment {correspondingly form-fitted structure (

) between sensor (720) and housing (310) and between sensing magnet(710) and bobbin (210)}. The second exemplary embodiment may include aresonance prevention structure of third exemplary embodiment {dampermember (2180) coating structure to bobbin (2110) and upper elasticmember (2150)}.

The third exemplary embodiment may include an assembly accuracyimprovement structure of sensor (720) and sensing magnet (710) of firstexemplary embodiment {correspondingly form-fitted structure (

) between sensor (720) and housing (310) and between sensing magnet(710) and bobbin (210)}. The third exemplary embodiment may include aconductive line forming structure of driving coil (1220) improved inworkability according to the second exemplary embodiment {coupledstructure between lower support member (16200) and substrate (1400)}.

Although the present disclosure has been explained with all constituentelements forming the exemplary embodiments of the present disclosurebeing combined in one embodiment, or being operated in one embodiment,the present disclosure is not limited thereto. That is, all elements mayoperate by allowing one or more elements to be selectively combined aslong as within the scope of object of the invention.

Furthermore, terms such as “includes”, “including”, “have”, “having”,“comprises” and/or “comprising” as used herein mean that the relevantelements are embedded, unless otherwise described, such that thementioned elements are not excluded but may be further included.

Unless otherwise defined, all terms including technical and scientificterms used herein have the same meaning as commonly understood by one ofordinary skill in the art to which this invention belongs. It will befurther understood that terms, such as those defined in commonly useddictionaries, should be interpreted as having a meaning that isconsistent with their meaning in the context of the relevant art and thepresent disclosure, and will not be interpreted in an idealized oroverly formal sense unless expressly so defined herein.

The foregoing explanations are intended only to be illustrative of thetechnical ideas of the present invention, and therefore, it should beappreciated by the skilled in the art that various modifications andamendments to the above examples may be made without deviating from thescope of protection of the invention.

The exemplary embodiments disclosed by the present invention are not tolimit the technical ideas of the present invention but to explain thepresent invention, and therefore, the technical ideas of presentinvention are not to be limited by the exemplary embodiments.

The scope of protection of the present invention should be interpretedby the following claims and all technical ideas within the equivalentscope should be interpreted as being included in the scope of right ofthe present invention.

1. A lens driving device comprising: a cover member comprising an upperplate and a lateral plate extending from the upper plate; a bobbindisposed in the cover member; a housing disposed between the covermember and the bobbin; a coil disposed on the bobbin; a first magnetdisposed between the coil and the lateral plate of the cover member; asecond magnet disposed on the bobbin; a substrate disposed on thelateral plate of the cover member; and a sensor disposed on thesubstrate, wherein the sensor is overlapped with the second magnet in adirection perpendicular to an optical axis, wherein a lower surface ofthe second magnet is fixed to the bobbin, and wherein an upper surfaceof the sensor is fixed to the housing.
 2. The lens driving device ofclaim 1, wherein the second magnet comprises an upper surface facing theupper plate of the cover member, and wherein the lower surface of thesecond magnet is disposed opposite to the upper surface of the secondmagnet.
 3. The lens driving device of claim 1, comprising a basedisposed below the bobbin and coupled with the lateral plate of thecover member, wherein the sensor comprises a lower surface facing thebase, and wherein the upper surface of the sensor is disposed oppositeto the lower surface of the sensor.
 4. The lens driving device of claim1, wherein the lower surface of the second magnet is fixed by anadhesive.
 5. The lens driving device of claim 1, wherein the uppersurface of the sensor is contacted with the housing.
 6. The lens drivingdevice of claim 1, wherein the sensor comprises the upper surface, alower surface opposite to the upper surface, an inner surface facing thesecond magnet, an outer surface opposite to the inner surface, and bothlateral surfaces connecting the upper surface and the lower surface, andwherein one of the both lateral surfaces of the sensor is spaced apartfrom the housing.
 7. The lens driving device of claim 6, wherein theother of the both lateral surfaces of the sensor faces the housing. 8.The lens driving device of claim 1, wherein the coil is overlapped withthe second magnet and the sensor in the direction perpendicular to theoptical axis.
 9. The lens driving device of claim 1, wherein at least aportion of the substrate is disposed between the housing and the lateralplate of the cover member.
 10. The lens driving device of claim 1,wherein an adhesive fixes the substrate to the housing.
 11. The lensdriving device of claim 1, wherein the second magnet comprises an uppersurface opposite to the lower surface of the second magnet, and whereinat least a portion of an upper surface of the second magnet is opened.12. The lens driving device of claim 1, comprising: a base disposedbelow the bobbin and coupled with the lateral plate of the cover member;and a lower elastic member connecting the bobbin and the base, whereinthe lower elastic member connects the coil and the substrate.
 13. Thelens driving device of claim 1, wherein the sensor comprises a lowersurface opposite to the upper surface of the sensor, and wherein thelower surface of the sensor is opened.
 14. A camera module comprising: aprinted circuit board (PCB); an image sensor disposed on the PCB; thelens driving device of claim 1 disposed on the PCB; and a lens coupledto the bobbin of the lens driving device.
 15. An optical apparatuscomprising: a main body; the camera module of claim 14 disposed on themain body; and a display part disposed on the main body and outputtingan image photographed by the camera module.
 16. A lens driving devicecomprising: a cover member comprising an upper plate and a lateral plateextending from the upper plate; a bobbin disposed in the cover member; ahousing disposed between the cover member and the bobbin; a coildisposed on the bobbin; a first magnet disposed between the coil and thelateral plate of the cover member; a second magnet disposed on thebobbin; a substrate disposed on the lateral plate of the cover member;and a sensor disposed on the substrate, wherein the sensor detects thesecond magnet, wherein a lower surface of the second magnet is fixed tothe bobbin by an adhesive, and wherein the substrate is fixed to thehousing by an adhesive.
 17. The lens driving device of claim 16, whereinat least a portion of the substrate is disposed between the housing andthe lateral plate of the cover member.
 18. The lens driving device ofclaim 17, wherein the sensor comprises an upper surface contacted withthe housing.
 19. The lens driving device of claim 18, wherein the secondmagnet comprises an upper surface opposite to the lower surface of thesecond magnet, and wherein at least a portion of an upper surface of thesecond magnet is opened.
 20. A lens driving device comprising: a covermember comprising an upper plate and a lateral plate extending from theupper plate; a bobbin disposed in the cover member; a housing disposedbetween the cover member and the bobbin; a coil disposed on the bobbin;a first magnet disposed between the coil and the lateral plate of thecover member; a second magnet disposed on the bobbin; and a sensorsensing the second magnet.